tensorflow::
#include <array_ops.h>
Reshapes a quantized tensor as per the Reshape op.
Summary
Args:
* scope: A Scope object
* shape: Defines the shape of the output tensor.
* input_min: The minimum value of the input.
* input_max: The maximum value of the input.
Returns:
* `Output` output
* `Output` output_min: This value is copied from input_min.
* `Output` output_max: This value is copied from input_max. */
class QuantizedReshape {
public:
QuantizedReshape(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input shape, tensorflow::Input input_min,
tensorflow::Input input_max);
Operation operation; tensorflow::Output output; tensorflow::Output output_min; tensorflow::Output output_max; };
/** Returns the rank of a tensor.
This operation returns an integer representing the rank of `input`.
For example:
't' is [[[1, 1, 1], [2, 2, 2]], [[3, 3, 3], [4, 4, 4]]]
shape of tensor 't' is [2, 2, 3]
rank(t) ==> 3
**Note**: The rank of a tensor is not the same as the rank of a matrix. The rank
of a tensor is the number of indices required to uniquely select each element
of the tensor. Rank is also known as "order", "degree", or "ndims."
Args:
* scope: A Scope object
Returns:
* `Output`: The output tensor. */
class Rank {
public:
Rank(const ::tensorflow::Scope& scope, ::tensorflow::Input input);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Reshapes a tensor.
Given `tensor`, this operation returns a tensor that has the same values
as `tensor` with shape `shape`.
If one component of 1-D tensor `shape` is the special value -1, the size of that
dimension is computed so that the total size remains constant. In particular, a
`shape` of `[-1]` flattens into 1-D. At most one component of `shape` may be
unknown.
The `shape` must be 1-D and the operation returns a tensor with shape
`shape` filled with the values of `tensor`. In this case, the number of elements
implied by `shape` must be the same as the number of elements in `tensor`.
It is an error if `shape` is not 1-D.
For example:
tensor 't' is [1, 2, 3, 4, 5, 6, 7, 8, 9]
tensor 't' has shape [9]
reshape(t, [3, 3]) ==> [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
tensor 't' is [[[1, 1], [2, 2]],
[[3, 3], [4, 4]]]
tensor 't' has shape [2, 2, 2]
reshape(t, [2, 4]) ==> [[1, 1, 2, 2], [3, 3, 4, 4]]
tensor 't' is [[[1, 1, 1],
[2, 2, 2]],
[[3, 3, 3],
[4, 4, 4]],
[[5, 5, 5],
[6, 6, 6]]]
tensor 't' has shape [3, 2, 3]
pass '[-1]' to flatten 't'
reshape(t, [-1]) ==> [1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6]
-1 can also be used to infer the shape
-1 is inferred to be 9:
reshape(t, [2, -1]) ==> [[1, 1, 1, 2, 2, 2, 3, 3, 3], [4, 4, 4, 5, 5, 5, 6, 6, 6]]
-1 is inferred to be 2:
reshape(t, [-1, 9]) ==> [[1, 1, 1, 2, 2, 2, 3, 3, 3], [4, 4, 4, 5, 5, 5, 6, 6, 6]]
-1 is inferred to be 3:
reshape(t, [ 2, -1, 3]) ==> [[[1, 1, 1], [2, 2, 2], [3, 3, 3]], [[4, 4, 4], [5, 5, 5], [6, 6, 6]]]
tensor 't' is [7]
shape [] reshapes to a scalar
reshape(t, []) ==> 7
Args:
* scope: A Scope object
* shape: Defines the shape of the output tensor.
Returns:
* `Output`: The output tensor. */
class Reshape {
public:
Reshape(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input shape);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Assign `value` to the sliced l-value reference of `ref`.
The values of `value` are assigned to the positions in the variable
`ref` that are selected by the slice parameters. The slice parameters
`begin, `end`, `strides`, etc. work exactly as in `StridedSlice`.
NOTE this op currently does not support broadcasting and so `value`'s
shape must be exactly the shape produced by the slice of `ref`.
Args:
* scope: A Scope object
Returns:
* the created `Operation` */
class ResourceStridedSliceAssign {
public:
/// Optional attribute setters for ResourceStridedSliceAssign
struct Attrs {
/// Defaults to 0
TF_MUST_USE_RESULT Attrs BeginMask(int64 x) {
Attrs ret = *this;
ret.begin_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EndMask(int64 x) {
Attrs ret = *this;
ret.end_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EllipsisMask(int64 x) {
Attrs ret = *this;
ret.ellipsis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs NewAxisMask(int64 x) {
Attrs ret = *this;
ret.new_axis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs ShrinkAxisMask(int64 x) {
Attrs ret = *this;
ret.shrink_axis_mask_ = x;
return ret;
}
int64 begin_mask_ = 0;
int64 end_mask_ = 0;
int64 ellipsis_mask_ = 0;
int64 new_axis_mask_ = 0;
int64 shrink_axis_mask_ = 0;
};
ResourceStridedSliceAssign(const tensorflow::Scope& scope,
tensorflow::Input ref, tensorflow::Input begin,
tensorflow::Input end, tensorflow::Input
strides, tensorflow::Input value);
ResourceStridedSliceAssign(const tensorflow::Scope& scope,
tensorflow::Input ref, tensorflow::Input begin,
tensorflow::Input end, tensorflow::Input
strides, tensorflow::Input value, const
ResourceStridedSliceAssign::Attrs& attrs);
operator ::tensorflow::Operation() const { return operation; }
static Attrs BeginMask(int64 x) {
return Attrs().BeginMask(x);
}
static Attrs EndMask(int64 x) {
return Attrs().EndMask(x);
}
static Attrs EllipsisMask(int64 x) {
return Attrs().EllipsisMask(x);
}
static Attrs NewAxisMask(int64 x) {
return Attrs().NewAxisMask(x);
}
static Attrs ShrinkAxisMask(int64 x) {
return Attrs().ShrinkAxisMask(x);
}
Operation operation; };
/** Reverses variable length slices.
This op first slices `input` along the dimension `batch_dim`, and for each
slice `i`, reverses the first `seq_lengths[i]` elements along
the dimension `seq_dim`.
The elements of `seq_lengths` must obey `seq_lengths[i] <= input.dims[seq_dim]`,
and `seq_lengths` must be a vector of length `input.dims[batch_dim]`.
The output slice `i` along dimension `batch_dim` is then given by input
slice `i`, with the first `seq_lengths[i]` slices along dimension
`seq_dim` reversed.
For example:
Given this:
batch_dim = 0 seq_dim = 1 input.dims = (4, 8, ...) seq_lengths = [7, 2, 3, 5]
then slices of input are reversed on seq_dim, but only up to seq_lengths:
output[0, 0:7, :, ...] = input[0, 7:0:-1, :, ...] output[1, 0:2, :, ...] = input[1, 2:0:-1, :, ...] output[2, 0:3, :, ...] = input[2, 3:0:-1, :, ...] output[3, 0:5, :, ...] = input[3, 5:0:-1, :, ...]
while entries past seq_lens are copied through:
output[0, 7:, :, ...] = input[0, 7:, :, ...] output[1, 2:, :, ...] = input[1, 2:, :, ...] output[2, 3:, :, ...] = input[2, 3:, :, ...] output[3, 2:, :, ...] = input[3, 2:, :, ...]
In contrast, if:
Given this:
batch_dim = 2 seq_dim = 0 input.dims = (8, ?, 4, ...) seq_lengths = [7, 2, 3, 5]
then slices of input are reversed on seq_dim, but only up to seq_lengths:
output[0:7, :, 0, :, ...] = input[7:0:-1, :, 0, :, ...] output[0:2, :, 1, :, ...] = input[2:0:-1, :, 1, :, ...] output[0:3, :, 2, :, ...] = input[3:0:-1, :, 2, :, ...] output[0:5, :, 3, :, ...] = input[5:0:-1, :, 3, :, ...]
while entries past seq_lens are copied through:
output[7:, :, 0, :, ...] = input[7:, :, 0, :, ...] output[2:, :, 1, :, ...] = input[2:, :, 1, :, ...] output[3:, :, 2, :, ...] = input[3:, :, 2, :, ...] output[2:, :, 3, :, ...] = input[2:, :, 3, :, ...]
Args:
* scope: A Scope object
* input: The input to reverse.
* seq_lengths: 1-D with length `input.dims(batch_dim)` and
`max(seq_lengths) <= input.dims(seq_dim)`
* seq_dim: The dimension which is partially reversed.
Optional attributes (see `Attrs`):
* batch_dim: The dimension along which reversal is performed.
Returns:
* `Output`: The partially reversed input. It has the same shape as `input`. */
class ReverseSequence {
public:
/// Optional attribute setters for ReverseSequence
struct Attrs {
/** The dimension along which reversal is performed.
Defaults to 0 */
TF_MUST_USE_RESULT Attrs BatchDim(int64 x) {
Attrs ret = *this;
ret.batch_dim_ = x;
return ret;
}
int64 batch_dim_ = 0; }; ReverseSequence(const tensorflow::Scope& scope, tensorflow::Input input, tensorflow::Input seq_lengths, int64 seq_dim); ReverseSequence(const tensorflow::Scope& scope, tensorflow::Input input, tensorflow::Input seq_lengths, int64 seq_dim, const ReverseSequence::Attrs& attrs); operator ::tensorflow::Output() const { return output; } operator ::tensorflow::Input() const { return output; } ::tensorflow::Node* node() const { return output.node(); }
static Attrs BatchDim(int64 x) {
return Attrs().BatchDim(x);
}
Operation operation; tensorflow::Output output; };
/** Reverses specific dimensions of a tensor.
Given a `tensor`, and a `int32` tensor `axis` representing the set of
dimensions of `tensor` to reverse. This operation reverses each dimension
`i` for which there exists `j` s.t. `axis[j] == i`.
`tensor` can have up to 8 dimensions. The number of dimensions specified
in `axis` may be 0 or more entries. If an index is specified more than
once, a InvalidArgument error is raised.
For example:
tensor 't' is [[[[ 0, 1, 2, 3],
[ 4, 5, 6, 7],
[ 8, 9, 10, 11]],
[[12, 13, 14, 15],
[16, 17, 18, 19],
[20, 21, 22, 23]]]]
tensor 't' shape is [1, 2, 3, 4]
'dims' is [3] or 'dims' is [-1]
reverse(t, dims) ==> [[[[ 3, 2, 1, 0], [ 7, 6, 5, 4], [ 11, 10, 9, 8]], [[15, 14, 13, 12], [19, 18, 17, 16], [23, 22, 21, 20]]]]
'dims' is '[1]' (or 'dims' is '[-3]')
reverse(t, dims) ==> [[[[12, 13, 14, 15], [16, 17, 18, 19], [20, 21, 22, 23] [[ 0, 1, 2, 3], [ 4, 5, 6, 7], [ 8, 9, 10, 11]]]]
'dims' is '[2]' (or 'dims' is '[-2]')
reverse(t, dims) ==> [[[[8, 9, 10, 11], [4, 5, 6, 7], [0, 1, 2, 3]] [[20, 21, 22, 23], [16, 17, 18, 19], [12, 13, 14, 15]]]]
Args:
* scope: A Scope object
* tensor: Up to 8-D.
* axis: 1-D. The indices of the dimensions to reverse. Must be in the range
`[-rank(tensor), rank(tensor))`.
Returns:
* `Output`: The same shape as `tensor`. */
class Reverse {
public:
Reverse(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input axis);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Scatters `updates` into a tensor of shape `shape` according to `indices`.
Update the input tensor by scattering sparse `updates` according to individual values at the specified `indices`.
This op returns an `output` tensor with the `shape` you specify. This op is the
inverse of the tf.gather_nd operator which extracts values or slices from a
given tensor.
This operation is similar to `tf.tensor_scatter_add`, except that the tensor is
zero-initialized. Calling tf.scatter_nd(indices, values, shape)
is identical to calling
`tf.tensor_scatter_add(tf.zeros(shape, values.dtype), indices, values)`.
If `indices` contains duplicates, the duplicate `values` are accumulated
(summed).
**WARNING**: The order in which updates are applied is nondeterministic, so the
output will be nondeterministic if `indices` contains duplicates;
numbers summed in different order may yield different results because of some
numerical approximation issues.
`indices` is an integer tensor of shape `shape`. The last dimension
of `indices` can be at most the rank of `shape`:
indices.shape[-1] <= shape.rank
The last dimension of `indices` corresponds to indices of elements
(if `indices.shape[-1] = shape.rank`) or slices
(if `indices.shape[-1] < shape.rank`) along dimension `indices.shape[-1]` of
`shape`.
`updates` is a tensor with shape:
indices.shape[:-1] + shape[indices.shape[-1]:]
The simplest form of the scatter op is to insert individual elements in
a tensor by index. Consider an example where you want to insert 4 scattered
elements in a rank-1 tensor with 8 elements.
In Python, this scatter operation would look like this:python indices = tf.constant([[4], [3], [1], [7]]) updates = tf.constant([9, 10, 11, 12]) shape = tf.constant([8]) scatter = tf.scatter_nd(indices, updates, shape) print(scatter)
The resulting tensor would look like this:
[0, 11, 0, 10, 9, 0, 0, 12]
You can also insert entire slices of a higher rank tensor all at once. For
example, you can insert two slices in the first dimension of a rank-3 tensor
with two matrices of new values.
In Python, this scatter operation would look like this:python indices = tf.constant([[0], [2]]) updates = tf.constant([[[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]], [[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]]]) shape = tf.constant([4, 4, 4]) scatter = tf.scatter_nd(indices, updates, shape) print(scatter)
The resulting tensor would look like this:
[[[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]],
[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]],
[[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]],
[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]]
Note that on CPU, if an out of bound index is found, an error is returned.
On GPU, if an out of bound index is found, the index is ignored.
Args:
* scope: A Scope object
* indices: Tensor of indices.
* updates: Values to scatter into the output tensor.
* shape: 1-D. The shape of the output tensor.
Returns:
* `Output`: A new tensor with the given shape and updates applied according
to the indices. */
class ScatterNd {
public:
ScatterNd(const tensorflow::Scope& scope, tensorflow::Input indices,
tensorflow::Input updates, tensorflow::Input shape);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Applies sparse addition to `input` using individual values or slices
from `updates` according to indices `indices`. The updates are non-aliasing:
`input` is only modified in-place if no other operations will use it.
Otherwise, a copy of `input` is made. This operation has a gradient with
respect to both `input` and `updates`.
`input` is a `Tensor` with rank `P` and `indices` is a `Tensor` of rank `Q`.
`indices` must be integer tensor, containing indices into `input`.
It must be shape \([d_0, ..., d_{Q-2}, K]\) where `0 < K <= P`.
The innermost dimension of `indices` (with length `K`) corresponds to
indices into elements (if `K = P`) or `(P-K)`-dimensional slices
(if `K < P`) along the `K`th dimension of `input`.
`updates` is `Tensor` of rank `Q-1+P-K` with shape:
$$[d_0, ..., d_{Q-2}, input.shape[K], ..., input.shape[P-1]].$$
For example, say we want to add 4 scattered elements to a rank-1 tensor to 8
elements. In Python, that addition would look like this:
input = tf.constant([1, 2, 3, 4, 5, 6, 7, 8])
indices = tf.constant([[4], [3], [1], [7]])
updates = tf.constant([9, 10, 11, 12])
output = tf.scatter_nd_non_aliasing_add(input, indices, updates)
with tf.Session() as sess:
print(sess.run(output))
The resulting value `output` would look like this:
[1, 13, 3, 14, 14, 6, 7, 20]
See tf.scatter_nd for more details about how to make updates to slices.
Args:
* scope: A Scope object
* input: A Tensor.
* indices: A Tensor. Must be one of the following types: `int32`, `int64`.
A tensor of indices into `input`.
* updates: A Tensor. Must have the same type as ref. A tensor of updated values
to add to `input`.
Returns:
* `Output`: A `Tensor` with the same shape as `input`, containing values of `input`
updated with `updates`. */
class ScatterNdNonAliasingAdd {
public:
ScatterNdNonAliasingAdd(const tensorflow::Scope& scope, tensorflow::Input
input, tensorflow::Input indices, tensorflow::Input
updates);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Returns the shape of a tensor.
This operation returns a 1-D integer tensor representing the shape of `input`.
For example:
't' is [[[1, 1, 1], [2, 2, 2]], [[3, 3, 3], [4, 4, 4]]]
shape(t) ==> [2, 2, 3]
Args:
* scope: A Scope object
Returns:
* `Output`: The output tensor. */
class Shape {
public:
/// Optional attribute setters for Shape
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutType(DataType x) {
Attrs ret = *this;
ret.out_type_ = x;
return ret;
}
DataType out_type_ = DT_INT32; }; Shape(const ::tensorflow::Scope& scope, ::tensorflow::Input input); Shape(const tensorflow::Scope& scope, tensorflow::Input input, const Shape::Attrs& attrs); operator ::tensorflow::Output() const { return output; } operator ::tensorflow::Input() const { return output; } ::tensorflow::Node* node() const { return output.node(); }
static Attrs OutType(DataType x) {
return Attrs().OutType(x);
}
Operation operation; tensorflow::Output output; };
/** Returns shape of tensors.
This operation returns N 1-D integer tensors representing shape of `input[i]s`.
Args:
* scope: A Scope object
Returns:
* `OutputList`: The output tensor. */
class ShapeN {
public:
/// Optional attribute setters for ShapeN
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutType(DataType x) {
Attrs ret = *this;
ret.out_type_ = x;
return ret;
}
DataType out_type_ = DT_INT32; }; ShapeN(const ::tensorflow::Scope& scope, ::tensorflow::InputList input); ShapeN(const tensorflow::Scope& scope, tensorflow::InputList input, const ShapeN::Attrs& attrs); tensorflow::Output operator[](size_t index) const { return output[index]; }
static Attrs OutType(DataType x) {
return Attrs().OutType(x);
}
Operation operation; ::tensorflow::OutputList output; };
/** Returns the size of a tensor.
This operation returns an integer representing the number of elements in
`input`.
For example:
't' is [[[1, 1,, 1], [2, 2, 2]], [[3, 3, 3], [4, 4, 4]]]]
size(t) ==> 12
Args:
* scope: A Scope object
Returns:
* `Output`: The output tensor. */
class Size {
public:
/// Optional attribute setters for Size
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutType(DataType x) {
Attrs ret = *this;
ret.out_type_ = x;
return ret;
}
DataType out_type_ = DT_INT32; }; Size(const ::tensorflow::Scope& scope, ::tensorflow::Input input); Size(const tensorflow::Scope& scope, tensorflow::Input input, const Size::Attrs& attrs); operator ::tensorflow::Output() const { return output; } operator ::tensorflow::Input() const { return output; } ::tensorflow::Node* node() const { return output.node(); }
static Attrs OutType(DataType x) {
return Attrs().OutType(x);
}
Operation operation; tensorflow::Output output; };
/** Return a slice from 'input'.
The output tensor is a tensor with dimensions described by 'size'
whose values are extracted from 'input' starting at the offsets in
'begin'.
*Requirements*:
0 <= begin[i] <= begin[i] + size[i] <= Di for i in [0, n)
Args:
* scope: A Scope object
* begin: begin[i] specifies the offset into the 'i'th dimension of
'input' to slice from.
* size: size[i] specifies the number of elements of the 'i'th dimension
of 'input' to slice. If size[i] is -1, all remaining elements in dimension
i are included in the slice (i.e. this is equivalent to setting
size[i] = input.dim_size(i) - begin[i]).
Returns:
* `Output`: The output tensor. */
class Slice {
public:
Slice(const tensorflow::Scope& scope, tensorflow::Input input,
tensorflow::Input begin, tensorflow::Input size);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Returns a copy of the input tensor.
Args:
* scope: A Scope object
Returns:
* `Output`: The output tensor. */
class Snapshot {
public:
Snapshot(const ::tensorflow::Scope& scope, ::tensorflow::Input input);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** SpaceToBatch for 4-D tensors of type T.
This is a legacy version of the more general SpaceToBatchND.
Zero-pads and then rearranges (permutes) blocks of spatial data into batch.
More specifically, this op outputs a copy of the input tensor where values from
the `height` and `width` dimensions are moved to the `batch` dimension. After
the zero-padding, both `height` and `width` of the input must be divisible by the
block size.
The attr `block_size` must be greater than one. It indicates the block size.
* Non-overlapping blocks of size `block_size x block size` in the height and
width dimensions are rearranged into the batch dimension at each location.
* The batch of the output tensor is `batch * block_size * block_size`.
* Both height_pad and width_pad must be divisible by block_size.
The shape of the output will be:
[batch*block_size*block_size, height_pad/block_size, width_pad/block_size,
depth]
Some examples:
(1) For the following input of shape `[1, 2, 2, 1]` and block_size of 2:x = [[[[1], [2]], [[3], [4]]]]
The output tensor has shape `[4, 1, 1, 1]` and value:[[[[1]]], [[[2]]], [[[3]]], [[[4]]]]
(2) For the following input of shape `[1, 2, 2, 3]` and block_size of 2:x = [[[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]]]
The output tensor has shape `[4, 1, 1, 3]` and value:[[[[1, 2, 3]]], [[[4, 5, 6]]], [[[7, 8, 9]]], [[[10, 11, 12]]]]
(3) For the following input of shape `[1, 4, 4, 1]` and block_size of 2:x = [[[[1], [2], [3], [4]], [[5], [6], [7], [8]], [[9], [10], [11], [12]], [[13], [14], [15], [16]]]]
The output tensor has shape `[4, 2, 2, 1]` and value:x = [[[[1], [3]], [[9], [11]]], [[[2], [4]], [[10], [12]]], [[[5], [7]], [[13], [15]]], [[[6], [8]], [[14], [16]]]]
(4) For the following input of shape `[2, 2, 4, 1]` and block_size of 2:x = [[[[1], [2], [3], [4]], [[5], [6], [7], [8]]], [[[9], [10], [11], [12]], [[13], [14], [15], [16]]]]
The output tensor has shape `[8, 1, 2, 1]` and value:x = [[[[1], [3]]], [[[9], [11]]], [[[2], [4]]], [[[10], [12]]], [[[5], [7]]], [[[13], [15]]], [[[6], [8]]], [[[14], [16]]]]
Among others, this operation is useful for reducing atrous convolution into
regular convolution.
Args:
* scope: A Scope object
* input: 4-D with shape `[batch, height, width, depth]`.
* paddings: 2-D tensor of non-negative integers with shape `[2, 2]`. It specifies
the padding of the input with zeros across the spatial dimensions as follows:
paddings = [[pad_top, pad_bottom], [pad_left, pad_right]]
The effective spatial dimensions of the zero-padded input tensor will be:
height_pad = pad_top + height + pad_bottom
width_pad = pad_left + width + pad_right
Returns:
* `Output`: The output tensor. */
class SpaceToBatch {
public:
SpaceToBatch(const tensorflow::Scope& scope, tensorflow::Input input,
tensorflow::Input paddings, int64 block_size);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** SpaceToBatch for N-D tensors of type T.
This operation divides "spatial" dimensions `[1, ..., M]` of the input into a
grid of blocks of shape `block_shape`, and interleaves these blocks with the
"batch" dimension (0) such that in the output, the spatial dimensions
`[1, ..., M]` correspond to the position within the grid, and the batch
dimension combines both the position within a spatial block and the original
batch position. Prior to division into blocks, the spatial dimensions of the
input are optionally zero padded according to `paddings`. See below for a
precise description.
This operation is equivalent to the following steps:
1. Zero-pad the start and end of dimensions `[1, ..., M]` of the
input according to `paddings` to produce `padded` of shape `padded_shape`.
2. Reshape `padded` to `reshaped_padded` of shape:
[batch] +
[padded_shape[1] / block_shape[0],
block_shape[0],
...,
padded_shape[M] / block_shape[M-1],
block_shape[M-1]] +
remaining_shape
3. Permute dimensions of `reshaped_padded` to produce
`permuted_reshaped_padded` of shape:
block_shape +
[batch] +
[padded_shape[1] / block_shape[0],
...,
padded_shape[M] / block_shape[M-1]] +
remaining_shape
4. Reshape `permuted_reshaped_padded` to flatten `block_shape` into the batch
dimension, producing an output tensor of shape:
[batch * prod(block_shape)] +
[padded_shape[1] / block_shape[0],
...,
padded_shape[M] / block_shape[M-1]] +
remaining_shape
Some examples:
(1) For the following input of shape `[1, 2, 2, 1]`, `block_shape = [2, 2]`, and
`paddings = [[0, 0], [0, 0]]`:
x = [[[[1], [2]], [[3], [4]]]]
The output tensor has shape `[4, 1, 1, 1]` and value:[[[[1]]], [[[2]]], [[[3]]], [[[4]]]]
(2) For the following input of shape `[1, 2, 2, 3]`, `block_shape = [2, 2]`, and
`paddings = [[0, 0], [0, 0]]`:
x = [[[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]]]
The output tensor has shape `[4, 1, 1, 3]` and value:[[[[1, 2, 3]]], [[[4, 5, 6]]], [[[7, 8, 9]]], [[[10, 11, 12]]]]
(3) For the following input of shape `[1, 4, 4, 1]`, `block_shape = [2, 2]`, and
`paddings = [[0, 0], [0, 0]]`:
x = [[[[1], [2], [3], [4]], [[5], [6], [7], [8]], [[9], [10], [11], [12]], [[13], [14], [15], [16]]]]
The output tensor has shape `[4, 2, 2, 1]` and value:x = [[[[1], [3]], [[9], [11]]], [[[2], [4]], [[10], [12]]], [[[5], [7]], [[13], [15]]], [[[6], [8]], [[14], [16]]]]
(4) For the following input of shape `[2, 2, 4, 1]`, block_shape = `[2, 2]`, and
paddings = `[[0, 0], [2, 0]]`:
x = [[[[1], [2], [3], [4]], [[5], [6], [7], [8]]], [[[9], [10], [11], [12]], [[13], [14], [15], [16]]]]
The output tensor has shape `[8, 1, 3, 1]` and value:x = [[[[0], [1], [3]]], [[[0], [9], [11]]], [[[0], [2], [4]]], [[[0], [10], [12]]], [[[0], [5], [7]]], [[[0], [13], [15]]], [[[0], [6], [8]]], [[[0], [14], [16]]]]
Among others, this operation is useful for reducing atrous convolution into
regular convolution.
Args:
* scope: A Scope object
* input: N-D with shape `input_shape = [batch] + spatial_shape + remaining_shape`,
where spatial_shape has `M` dimensions.
* block_shape: 1-D with shape `[M]`, all values must be >= 1.
* paddings: 2-D with shape `[M, 2]`, all values must be >= 0.
`paddings[i] = [pad_start, pad_end]` specifies the padding for input dimension
`i + 1`, which corresponds to spatial dimension `i`. It is required that
`block_shape[i]` divides `input_shape[i + 1] + pad_start + pad_end`.
Returns:
* `Output`: The output tensor. */
class SpaceToBatchND {
public:
SpaceToBatchND(const tensorflow::Scope& scope, tensorflow::Input input,
tensorflow::Input block_shape, tensorflow::Input paddings);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** SpaceToDepth for tensors of type T.
Rearranges blocks of spatial data, into depth. More specifically,
this op outputs a copy of the input tensor where values from the `height`
and `width` dimensions are moved to the `depth` dimension.
The attr `block_size` indicates the input block size.
* Non-overlapping blocks of size `block_size x block size` are rearranged
into depth at each location.
* The depth of the output tensor is `block_size * block_size * input_depth`.
* The Y, X coordinates within each block of the input become the high order
component of the output channel index.
* The input tensor's height and width must be divisible by block_size.
The `data_format` attr specifies the layout of the input and output tensors
with the following options:
"NHWC": `[ batch, height, width, channels ]`
"NCHW": `[ batch, channels, height, width ]`
"NCHW_VECT_C":
`qint8 [ batch, channels / 4, height, width, 4 ]`
It is useful to consider the operation as transforming a 6-D Tensor. e.g. for data_format = NHWC, Each element in the input tensor can be specified via 6 coordinates, ordered by decreasing memory layout significance as: n,oY,bY,oX,bX,iC (where n=batch index, oX, oY means X or Y coordinates within the output image, bX, bY means coordinates within the input block, iC means input channels). The output would be a transpose to the following layout: n,oY,oX,bY,bX,iC
This operation is useful for resizing the activations between convolutions
(but keeping all data), e.g. instead of pooling. It is also useful for training
purely convolutional models.
For example, given an input of shape `[1, 2, 2, 1]`, data_format = "NHWC" and
block_size = 2:
x = [[[[1], [2]], [[3], [4]]]]
This operation will output a tensor of shape `[1, 1, 1, 4]`:[[[[1, 2, 3, 4]]]]
Here, the input has a batch of 1 and each batch element has shape `[2, 2, 1]`,
the corresponding output will have a single element (i.e. width and height are
both 1) and will have a depth of 4 channels (1 * block_size * block_size).
The output element shape is `[1, 1, 4]`.
For an input tensor with larger depth, here of shape `[1, 2, 2, 3]`, e.g.x = [[[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]]]
This operation, for block_size of 2, will return the following tensor of shape
`[1, 1, 1, 12]`
[[[[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]]]]
Similarly, for the following input of shape `[1 4 4 1]`, and a block size of 2:x = [[[[1], [2], [5], [6]], [[3], [4], [7], [8]], [[9], [10], [13], [14]], [[11], [12], [15], [16]]]]
the operator will return the following tensor of shape `[1 2 2 4]`:x = [[[[1, 2, 3, 4], [5, 6, 7, 8]], [[9, 10, 11, 12], [13, 14, 15, 16]]]]
Args:
* scope: A Scope object
* block_size: The size of the spatial block.
Returns:
* `Output`: The output tensor. */
class SpaceToDepth {
public:
/// Optional attribute setters for SpaceToDepth
struct Attrs {
/// Defaults to "NHWC"
TF_MUST_USE_RESULT Attrs DataFormat(StringPiece x) {
Attrs ret = *this;
ret.data_format_ = x;
return ret;
}
StringPiece data_format_ = "NHWC"; }; SpaceToDepth(const tensorflow::Scope& scope, tensorflow::Input input, int64 block_size); SpaceToDepth(const tensorflow::Scope& scope, tensorflow::Input input, int64 block_size, const SpaceToDepth::Attrs& attrs); operator ::tensorflow::Output() const { return output; } operator ::tensorflow::Input() const { return output; } ::tensorflow::Node* node() const { return output.node(); }
static Attrs DataFormat(StringPiece x) {
return Attrs().DataFormat(x);
}
Operation operation; tensorflow::Output output; };
/** Splits a tensor into `num_split` tensors along one dimension.
Args:
* scope: A Scope object
* axis: 0-D. The dimension along which to split. Must be in the range
`[-rank(value), rank(value))`.
* value: The tensor to split.
* num_split: The number of ways to split. Must evenly divide
`value.shape[split_dim]`.
Returns:
* `OutputList`: They are identically shaped tensors, whose shape matches that of `value`
except along `axis`, where their sizes are
`values.shape[split_dim] / num_split`. */
class Split {
public:
Split(const tensorflow::Scope& scope, tensorflow::Input axis,
tensorflow::Input value, int64 num_split);
tensorflow::Output operator[](size_t index) const { return output[index]; }
Operation operation; ::tensorflow::OutputList output; };
/** Splits a tensor into `num_split` tensors along one dimension.
Args:
* scope: A Scope object
* value: The tensor to split.
* size_splits: list containing the sizes of each output tensor along the split
dimension. Must sum to the dimension of value along split_dim.
Can contain one -1 indicating that dimension is to be inferred.
* axis: 0-D. The dimension along which to split. Must be in the range
`[-rank(value), rank(value))`.
Returns:
* `OutputList`: Tensors whose shape matches that of `value`
except along `axis`, where their sizes are
`size_splits[i]`. */
class SplitV {
public:
SplitV(const tensorflow::Scope& scope, tensorflow::Input value,
tensorflow::Input size_splits, tensorflow::Input axis, int64
num_split);
tensorflow::Output operator[](size_t index) const { return output[index]; }
Operation operation; ::tensorflow::OutputList output; };
/** Removes dimensions of size 1 from the shape of a tensor.
Given a tensor `input`, this operation returns a tensor of the same type with
all dimensions of size 1 removed. If you don't want to remove all size 1
dimensions, you can remove specific size 1 dimensions by specifying
`axis`.
For example:
't' is a tensor of shape [1, 2, 1, 3, 1, 1]
shape(squeeze(t)) ==> [2, 3]
Or, to remove specific size 1 dimensions:
't' is a tensor of shape [1, 2, 1, 3, 1, 1]
shape(squeeze(t, [2, 4])) ==> [1, 2, 3, 1]
Args:
* scope: A Scope object
* input: The `input` to squeeze.
Optional attributes (see `Attrs`):
* axis: If specified, only squeezes the dimensions listed. The dimension
index starts at 0. It is an error to squeeze a dimension that is not 1. Must
be in the range `[-rank(input), rank(input))`.
Returns:
* `Output`: Contains the same data as `input`, but has one or more dimensions of
size 1 removed. */
class Squeeze {
public:
/// Optional attribute setters for Squeeze
struct Attrs {
/** If specified, only squeezes the dimensions listed. The dimension
index starts at 0. It is an error to squeeze a dimension that is not 1. Must
be in the range `[-rank(input), rank(input))`.
Defaults to [] */
TF_MUST_USE_RESULT Attrs Axis(const gtl::ArraySlice& x) {
Attrs ret = *this;
ret.axis_ = x;
return ret;
}
gtl::ArraySliceaxis_ = {}; }; Squeeze(const ::tensorflow::Scope& scope, ::tensorflow::Input input); Squeeze(const tensorflow::Scope& scope, tensorflow::Input input, const Squeeze::Attrs& attrs); operator ::tensorflow::Output() const { return output; } operator ::tensorflow::Input() const { return output; } ::tensorflow::Node* node() const { return output.node(); }
static Attrs Axis(const gtl::ArraySlice& x) { return Attrs().Axis(x); }
Operation operation; tensorflow::Output output; };
/** Stops gradient computation.
When executed in a graph, this op outputs its input tensor as-is.
When building ops to compute gradients, this op prevents the contribution of
its inputs to be taken into account. Normally, the gradient generator adds ops
to a graph to compute the derivatives of a specified 'loss' by recursively
finding out inputs that contributed to its computation. If you insert this op
in the graph it inputs are masked from the gradient generator. They are not
taken into account for computing gradients.
This is useful any time you want to compute a value with TensorFlow but need
to pretend that the value was a constant. For example, the softmax function
for a vector x can be written as
python
def softmax(x): numerator = tf.exp(x) denominator = tf.reduce_sum(numerator) return numerator / denominator
This however is susceptible to overflow if the values in x are large. An
alternative more stable way is to subtract the maximum of x from each of the
values.
python
def stable_softmax(x): z = x - tf.reduce_max(x) numerator = tf.exp(z) denominator = tf.reduce_sum(numerator) return numerator / denominator
However, when we backprop through the softmax to x, we dont want to backprop
through the tf.reduce_max(x) (if the max values are not unique then the
gradient could flow to the wrong input) calculation and treat that as a
constant. Therefore, we should write this out as
python
def stable_softmax(x): z = x - tf.stop_gradient(tf.reduce_max(x)) numerator = tf.exp(z) denominator = tf.reduce_sum(numerator) return numerator / denominator
Some other examples include:
* The *EM* algorithm where the *M-step* should not involve backpropagation
through the output of the *E-step*.
* Contrastive divergence training of Boltzmann machines where, when
differentiating the energy function, the training must not backpropagate
through the graph that generated the samples from the model.
* Adversarial training, where no backprop should happen through the adversarial
example generation process.
Args:
* scope: A Scope object
Returns:
* `Output`: The output tensor. */
class StopGradient {
public:
StopGradient(const ::tensorflow::Scope& scope, ::tensorflow::Input input);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Return a strided slice from `input`.
Note, most python users will want to use the PythonTensor.__getitem__orVariable.__getitem__rather than this op directly.
The goal of this op is to produce a new tensor with a subset of
the elements from the `n` dimensional `input` tensor. The subset is chosen using
a sequence of `m` sparse range specifications encoded into the arguments
of this function. Note, in some cases
`m` could be equal to `n`, but this need not be the case. Each
range specification entry can be one of the following:
- An ellipsis (...). Ellipses are used to imply zero or more dimensions of full-dimension selection and are produced using `ellipsis_mask`. For example, `foo[...]` is the identity slice.
- A new axis. This is used to insert a new shape=1 dimension and is produced using `new_axis_mask`. For example, `foo[:, ...]` where `foo` is shape `(3, 4)` produces a `(1, 3, 4)` tensor.
- A range `begin:end:stride`. This is used to specify how much to choose from a given dimension. `stride` can be any integer but 0. `begin` is an integer which represents the index of the first value to select while `end` represents the index of the last value to select. The number of values selected in each dimension is `end - begin` if `stride > 0` and `begin - end` if `stride < 0`. `begin` and `end` can be negative where `-1` is the last element, `-2` is the second to last. `begin_mask` controls whether to replace the explicitly given `begin` with an implicit effective value of `0` if `stride > 0` and `-1` if `stride < 0`. `end_mask` is analogous but produces the number required to create the largest open interval. For example, given a shape `(3,)` tensor `foo[:]`, the effective `begin` and `end` are `0` and `3`. Do not assume this is equivalent to `foo[0:-1]` which has an effective `begin` and `end` of `0` and `2`. Another example is `foo[-2::-1]` which reverses the first dimension of a tensor while dropping the last two (in the original order elements). For example `foo = [1,2,3,4]; foo[-2::-1]` is `[4,3]`.
- A single index. This is used to keep only elements that have a given index. For example (`foo[2, :]` on a shape `(5,6)` tensor produces a shape `(6,)` tensor. This is encoded in `begin` and `end` and `shrink_axis_mask`.
Each conceptual range specification is encoded in the op's argument. This
encoding is best understand by considering a non-trivial example. In
particular,
`foo[1, 2:4, None, ..., :-3:-1, :]` will be encoded as
begin = [1, 2, x, x, 0, x] # x denotes don't care (usually 0) end = [2, 4, x, x, -3, x] strides = [1, 1, x, x, -1, 1] begin_mask = 1<<4 | 1<<5 = 48 end_mask = 1<<5 = 32 ellipsis_mask = 1<<3 = 8 new_axis_mask = 1<<2 = 4 shrink_axis_mask = 1<<0 = 1
In this case if foo.shape is (5, 5, 5, 5, 5, 5) the final shape of
the slice becomes (2, 1, 5, 5, 2, 5).
Let us walk step by step through each argument specification.
1. The first argument in the example slice is turned intobegin = 1andend = begin + 1 = 2. To disambiguate from the original spec2:4we also set the appropriate bit inshrink_axis_mask.
2. 2:4 is contributes 2, 4, 1 to begin, end, and stride. All masks have
zero bits contributed.
3. None is a synonym for tf.newaxis. This means insert a dimension of size 1
dimension in the final shape. Dummy values are contributed to begin,
end and stride, while the new_axis_mask bit is set.
4. ... grab the full ranges from as many dimensions as needed to
fully specify a slice for every dimension of the input shape.
5.:-3:-1shows the use of negative indices. A negative indexiassociated with a dimension that has shapesis converted to a positive indexs + i. So-1becomess-1(i.e. the last element). This conversion is done internally so begin, end and strides receive x, -3, and -1. The appropriate begin_mask bit is set to indicate the start range is the full range (ignoring the x).
6.:indicates that the entire contents of the corresponding dimension is selected. This is equivalent to::or0::1. begin, end, and strides receive 0, 0, and 1, respectively. The appropriate bits inbegin_maskandend_maskare also set.
Requirements:
0 != strides[i] for i in [0, m)ellipsis_mask must be a power of two (only one ellipsis)
Args:
* scope: A Scope object
* begin: begin[k] specifies the offset into the kth range specification.
The exact dimension this corresponds to will be determined by context.
Out-of-bounds values will be silently clamped. If the kth bit of
begin_mask then begin[k] is ignored and the full range of the
appropriate dimension is used instead. Negative values causes indexing
to start from the highest element e.g. If foo==[1,2,3] then foo[-1]==3.
* end: end[i] is like begin with the exception that end_mask is
used to determine full ranges.
* strides: strides[i] specifies the increment in the ith specification
after extracting a given element. Negative indices will reverse
the original order. Out or range values are
clamped to [0,dim[i]) if slice[i]>0 or [-1,dim[i]-1] if slice[i] < 0
Optional attributes (seeAttrs): * begin_mask: a bitmask where a bit i being 1 means to ignore the begin value and instead use the largest interval possible. At runtime begin[i] will be replaced with[0, n-1)ifstride[i] > 0or[-1, n-1]ifstride[i] < 0* end_mask: analogous tobegin_mask* ellipsis_mask: a bitmask where bitibeing 1 means theith position is actually an ellipsis. One bit at most can be 1. Ifellipsis_mask == 0, then an implicit ellipsis mask of1 << (m+1)is provided. This means thatfoo[3:5] == foo[3:5, ...]. An ellipsis implicitly creates as many range specifications as necessary to fully specify the sliced range for every dimension. For example for a 4-dimensional tensorfoothe slicefoo[2, ..., 5:8]impliesfoo[2, :, :, 5:8]. * new_axis_mask: a bitmask where bitibeing 1 means theith specification creates a new shape 1 dimension. For examplefoo[:4, tf.newaxis, :2]would produce a shape(4, 1, 2)tensor. * shrink_axis_mask: a bitmask where bitiimplies that theith specification should shrink the dimensionality. begin and end must imply a slice of size 1 in the dimension. For example in python one might dofoo[:, 3, :]which would result inshrink_axis_maskbeing 2.
Returns:
* Output: The output tensor. */
class StridedSlice {
public:
/// Optional attribute setters for StridedSlice
struct Attrs {
/** a bitmask where a bit i being 1 means to ignore the begin
value and instead use the largest interval possible. At runtime
begin[i] will be replaced with [0, n-1) if stride[i] > 0 or
[-1, n-1] if stride[i] < 0
Defaults to 0 */
TF_MUST_USE_RESULT Attrs BeginMask(int64 x) {
Attrs ret = *this;
ret.begin_mask_ = x;
return ret;
}
/** analogous to begin_mask
Defaults to 0 */
TF_MUST_USE_RESULT Attrs EndMask(int64 x) {
Attrs ret = *this;
ret.end_mask_ = x;
return ret;
}
/** a bitmask where bitibeing 1 means theith position is actually an ellipsis. One bit at most can be 1. Ifellipsis_mask == 0, then an implicit ellipsis mask of1 << (m+1)is provided. This means thatfoo[3:5] == foo[3:5, ...]. An ellipsis implicitly creates as many range specifications as necessary to fully specify the sliced range for every dimension. For example for a 4-dimensional tensorfoothe slicefoo[2, ..., 5:8]impliesfoo[2, :, :, 5:8].
Defaults to 0 */
TF_MUST_USE_RESULT Attrs EllipsisMask(int64 x) {
Attrs ret = *this;
ret.ellipsis_mask_ = x;
return ret;
}
/** a bitmask where bitibeing 1 means theith specification creates a new shape 1 dimension. For examplefoo[:4, tf.newaxis, :2]would produce a shape(4, 1, 2)tensor.
Defaults to 0 */
TF_MUST_USE_RESULT Attrs NewAxisMask(int64 x) {
Attrs ret = *this;
ret.new_axis_mask_ = x;
return ret;
}
/** a bitmask where bitiimplies that theith specification should shrink the dimensionality. begin and end must imply a slice of size 1 in the dimension. For example in python one might dofoo[:, 3, :]which would result inshrink_axis_maskbeing 2.
Defaults to 0 */
TF_MUST_USE_RESULT Attrs ShrinkAxisMask(int64 x) {
Attrs ret = *this;
ret.shrink_axis_mask_ = x;
return ret;
}
int64 begin_mask_ = 0;
int64 end_mask_ = 0;
int64 ellipsis_mask_ = 0;
int64 new_axis_mask_ = 0;
int64 shrink_axis_mask_ = 0;
};
StridedSlice(const tensorflow::Scope& scope, tensorflow::Input input,
tensorflow::Input begin, tensorflow::Input end,
tensorflow::Input strides);
StridedSlice(const tensorflow::Scope& scope, tensorflow::Input input,
tensorflow::Input begin, tensorflow::Input end,
tensorflow::Input strides, const StridedSlice::Attrs& attrs);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
static Attrs BeginMask(int64 x) {
return Attrs().BeginMask(x);
}
static Attrs EndMask(int64 x) {
return Attrs().EndMask(x);
}
static Attrs EllipsisMask(int64 x) {
return Attrs().EllipsisMask(x);
}
static Attrs NewAxisMask(int64 x) {
return Attrs().NewAxisMask(x);
}
static Attrs ShrinkAxisMask(int64 x) {
return Attrs().ShrinkAxisMask(x);
}
Operation operation; tensorflow::Output output; };
/** Assignvalueto the sliced l-value reference ofref.
The values ofvalueare assigned to the positions in the variablerefthat are selected by the slice parameters. The slice parametersbegin,end,strides, etc. work exactly as inStridedSlice.
NOTE this op currently does not support broadcasting and sovalue's shape must be exactly the shape produced by the slice ofref.
Args:
* scope: A Scope object
Returns:
* Output: The output_ref tensor. */
class StridedSliceAssign {
public:
/// Optional attribute setters for StridedSliceAssign
struct Attrs {
/// Defaults to 0
TF_MUST_USE_RESULT Attrs BeginMask(int64 x) {
Attrs ret = *this;
ret.begin_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EndMask(int64 x) {
Attrs ret = *this;
ret.end_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EllipsisMask(int64 x) {
Attrs ret = *this;
ret.ellipsis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs NewAxisMask(int64 x) {
Attrs ret = *this;
ret.new_axis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs ShrinkAxisMask(int64 x) {
Attrs ret = *this;
ret.shrink_axis_mask_ = x;
return ret;
}
int64 begin_mask_ = 0;
int64 end_mask_ = 0;
int64 ellipsis_mask_ = 0;
int64 new_axis_mask_ = 0;
int64 shrink_axis_mask_ = 0;
};
StridedSliceAssign(const tensorflow::Scope& scope, tensorflow::Input ref,
tensorflow::Input begin, tensorflow::Input end,
tensorflow::Input strides, tensorflow::Input value);
StridedSliceAssign(const tensorflow::Scope& scope, tensorflow::Input ref,
tensorflow::Input begin, tensorflow::Input end,
tensorflow::Input strides, tensorflow::Input value,
const StridedSliceAssign::Attrs& attrs);
operator ::tensorflow::Output() const { return output_ref; }
operator ::tensorflow::Input() const { return output_ref; }
::tensorflow::Node* node() const { return output_ref.node(); }
static Attrs BeginMask(int64 x) {
return Attrs().BeginMask(x);
}
static Attrs EndMask(int64 x) {
return Attrs().EndMask(x);
}
static Attrs EllipsisMask(int64 x) {
return Attrs().EllipsisMask(x);
}
static Attrs NewAxisMask(int64 x) {
return Attrs().NewAxisMask(x);
}
static Attrs ShrinkAxisMask(int64 x) {
return Attrs().ShrinkAxisMask(x);
}
Operation operation; tensorflow::Output output_ref; };
/** Returns the gradient of StridedSlice.
SinceStridedSlicecuts out pieces of itsinputwhich is sizeshape, its gradient will have the same shape (which is passed here asshape). The gradient will be zero in any element that the slice does not select.
Arguments are the same as StridedSliceGrad with the exception that
dy is the input gradient to be propagated and shape is the
shape of StridedSlice's input.
Args:
* scope: A Scope object
Returns:
* Output: The output tensor. */
class StridedSliceGrad {
public:
/// Optional attribute setters for StridedSliceGrad
struct Attrs {
/// Defaults to 0
TF_MUST_USE_RESULT Attrs BeginMask(int64 x) {
Attrs ret = *this;
ret.begin_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EndMask(int64 x) {
Attrs ret = *this;
ret.end_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EllipsisMask(int64 x) {
Attrs ret = *this;
ret.ellipsis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs NewAxisMask(int64 x) {
Attrs ret = *this;
ret.new_axis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs ShrinkAxisMask(int64 x) {
Attrs ret = *this;
ret.shrink_axis_mask_ = x;
return ret;
}
int64 begin_mask_ = 0;
int64 end_mask_ = 0;
int64 ellipsis_mask_ = 0;
int64 new_axis_mask_ = 0;
int64 shrink_axis_mask_ = 0;
};
StridedSliceGrad(const tensorflow::Scope& scope, tensorflow::Input shape,
tensorflow::Input begin, tensorflow::Input end,
tensorflow::Input strides, tensorflow::Input dy);
StridedSliceGrad(const tensorflow::Scope& scope, tensorflow::Input shape,
tensorflow::Input begin, tensorflow::Input end,
tensorflow::Input strides, tensorflow::Input dy, const
StridedSliceGrad::Attrs& attrs);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
static Attrs BeginMask(int64 x) {
return Attrs().BeginMask(x);
}
static Attrs EndMask(int64 x) {
return Attrs().EndMask(x);
}
static Attrs EllipsisMask(int64 x) {
return Attrs().EllipsisMask(x);
}
static Attrs NewAxisMask(int64 x) {
return Attrs().NewAxisMask(x);
}
static Attrs ShrinkAxisMask(int64 x) {
return Attrs().ShrinkAxisMask(x);
}
Operation operation; tensorflow::Output output; };
/** Adds sparseupdatesto an existing tensor according toindices.
This operation creates a new tensor by adding sparseupdatesto the passed intensor. This operation is very similar totf.compat.v1.scatter_nd_add, except that the updates are added onto an existing tensor (as opposed to a variable). If the memory for the existing tensor cannot be re-used, a copy is made and updated.
indicesis an integer tensor containing indices into a new tensor of shapetensor.shape. The last dimension ofindicescan be at most the rank oftensor.shape:
indices.shape[-1] <= tensor.shape.rank
The last dimension ofindicescorresponds to indices into elements (ifindices.shape[-1] = tensor.shape.rank) or slices (ifindices.shape[-1] < tensor.shape.rank) along dimensionindices.shape[-1]oftensor.shape.updatesis a tensor with shape
indices.shape[:-1] + tensor.shape[indices.shape[-1]:]
The simplest form of tensor_scatter_add is to add individual elements to a
tensor by index. For example, say we want to add 4 elements in a rank-1
tensor with 8 elements.
In Python, this scatter add operation would look like this:python indices = tf.constant([[4], [3], [1], [7]]) updates = tf.constant([9, 10, 11, 12]) tensor = tf.ones([8], dtype=tf.int32) updated = tf.tensor_scatter_nd_add(tensor, indices, updates) print(updated)
The resulting tensor would look like this:
[1, 12, 1, 11, 10, 1, 1, 13]
We can also, insert entire slices of a higher rank tensor all at once. For
example, if we wanted to insert two slices in the first dimension of a
rank-3 tensor with two matrices of new values.
In Python, this scatter add operation would look like this:python indices = tf.constant([[0], [2]]) updates = tf.constant([[[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]], [[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]]]) tensor = tf.ones([4, 4, 4],dtype=tf.int32) updated = tf.tensor_scatter_nd_add(tensor, indices, updates) print(updated)
The resulting tensor would look like this:
[[[6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8], [9, 9, 9, 9]],
[[1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1]],
[[6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8], [9, 9, 9, 9]],
[[1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1]]]
Note that on CPU, if an out of bound index is found, an error is returned.
On GPU, if an out of bound index is found, the index is ignored.
Args:
* scope: A Scope object
* tensor: Tensor to copy/update.
* indices: Index tensor.
* updates: Updates to scatter into output.
Returns:
* `Output`: A new tensor copied from tensor and updates added according to the indices. */
class TensorScatterAdd {
public:
TensorScatterAdd(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input indices, tensorflow::Input updates);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Apply a sparse update to a tensor taking the element-wise maximum.
Returns a new tensor copied from `tensor` whose values are element-wise maximum between
tensor and updates according to the indices.
>>> tensor = [0, 0, 0, 0, 0, 0, 0, 0]
>>> indices = [[1], [4], [5]]
>>> updates = [1, -1, 1]
>>> tf.tensor_scatter_nd_max(tensor, indices, updates).numpy()
array([0, 1, 0, 0, 0, 1, 0, 0], dtype=int32)
Refer to tf.tensor_scatter_nd_update for more details.
Args:
* scope: A Scope object
* tensor: Tensor to update.
* indices: Index tensor.
* updates: Updates to scatter into output.
Returns:
* `Output`: A new tensor copied from tensor whose values are element-wise maximum between tensor and updates according to the indices. */
class TensorScatterMax {
public:
TensorScatterMax(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input indices, tensorflow::Input updates);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** TODO: add doc.
Args:
* scope: A Scope object
* tensor: Tensor to update.
* indices: Index tensor.
* updates: Updates to scatter into output.
Returns:
* `Output`: A new tensor copied from tensor whose values are element-wise minimum between tensor and updates according to the indices. */
class TensorScatterMin {
public:
TensorScatterMin(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input indices, tensorflow::Input updates);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Subtracts sparse `updates` from an existing tensor according to `indices`.
This operation creates a new tensor by subtracting sparse `updates` from the
passed in `tensor`.
This operation is very similar to `tf.scatter_nd_sub`, except that the updates
are subtracted from an existing tensor (as opposed to a variable). If the memory
for the existing tensor cannot be re-used, a copy is made and updated.
`indices` is an integer tensor containing indices into a new tensor of shape
`shape`. The last dimension of `indices` can be at most the rank of `shape`:
indices.shape[-1] <= shape.rank
The last dimension of `indices` corresponds to indices into elements
(if `indices.shape[-1] = shape.rank`) or slices
(if `indices.shape[-1] < shape.rank`) along dimension `indices.shape[-1]` of
`shape`. `updates` is a tensor with shape
indices.shape[:-1] + shape[indices.shape[-1]:]
The simplest form of tensor_scatter_sub is to subtract individual elements
from a tensor by index. For example, say we want to insert 4 scattered elements
in a rank-1 tensor with 8 elements.
In Python, this scatter subtract operation would look like this:python indices = tf.constant([[4], [3], [1], [7]]) updates = tf.constant([9, 10, 11, 12]) tensor = tf.ones([8], dtype=tf.int32) updated = tf.tensor_scatter_nd_sub(tensor, indices, updates) print(updated)
The resulting tensor would look like this:
[1, -10, 1, -9, -8, 1, 1, -11]
We can also, insert entire slices of a higher rank tensor all at once. For
example, if we wanted to insert two slices in the first dimension of a
rank-3 tensor with two matrices of new values.
In Python, this scatter add operation would look like this:python indices = tf.constant([[0], [2]]) updates = tf.constant([[[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]], [[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]]]) tensor = tf.ones([4, 4, 4],dtype=tf.int32) updated = tf.tensor_scatter_nd_sub(tensor, indices, updates) print(updated)
The resulting tensor would look like this:
[[[-4, -4, -4, -4], [-5, -5, -5, -5], [-6, -6, -6, -6], [-7, -7, -7, -7]],
[[1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1]],
[[-4, -4, -4, -4], [-5, -5, -5, -5], [-6, -6, -6, -6], [-7, -7, -7, -7]],
[[1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1]]]
Note that on CPU, if an out of bound index is found, an error is returned.
On GPU, if an out of bound index is found, the index is ignored.
Args:
* scope: A Scope object
* tensor: Tensor to copy/update.
* indices: Index tensor.
* updates: Updates to scatter into output.
Returns:
* `Output`: A new tensor copied from tensor and updates subtracted according to the indices. */
class TensorScatterSub {
public:
TensorScatterSub(const tensorflow::Scope& scope, tensorflow::Input tensor,
tensorflow::Input indices, tensorflow::Input updates);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Scatter `updates` into an existing tensor according to `indices`.
This operation creates a new tensor by applying sparse `updates` to the passed
in `tensor`.
This operation is very similar to tf.scatter_nd, except that the updates are
scattered onto an existing tensor (as opposed to a zero-tensor). If the memory
for the existing tensor cannot be re-used, a copy is made and updated.
If `indices` contains duplicates, then we pick the last update for the index.
If an out of bound index is found on CPU, an error is returned.
**WARNING**: There are some GPU specific semantics for this operation.
- If an out of bound index is found, the index is ignored.
- The order in which updates are applied is nondeterministic, so the output will be nondeterministic if `indices` contains duplicates.
`indices` is an integer tensor containing indices into a new tensor of shape
`shape`.
* `indices` must have at least 2 axes: `(num_updates, index_depth)`.
* The last axis of `indices` is how deep to index into `tensor` so this index
depth must be less than the rank of `tensor`: `indices.shape[-1] <= tensor.ndim`
if `indices.shape[-1] = tensor.rank` this Op indexes and updates scalar elements.
if `indices.shape[-1] < tensor.rank` it indexes and updates slices of the input
`tensor`.
Each `update` has a rank of `tensor.rank - indices.shape[-1]`.
The overall shape of `updates` is:
indices.shape[:-1] + tensor.shape[indices.shape[-1]:]
For usage examples see the python [tf.tensor_scatter_nd_update](
https://www.tensorflow.org/api_docs/python/tf/tensor_scatter_nd_update) function
Args:
* scope: A Scope object
* tensor: Tensor to copy/update.
* indices: Index tensor.
* updates: Updates to scatter into output.
Returns:
* `Output`: A new tensor with the given shape and updates applied according
to the indices. */
class TensorScatterUpdate {
public:
TensorScatterUpdate(const tensorflow::Scope& scope, tensorflow::Input
tensor, tensorflow::Input indices, tensorflow::Input
updates);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Assign `value` to the sliced l-value reference of `input`.
The values of `value` are assigned to the positions in the tensor `input` that
are selected by the slice parameters. The slice parameters `begin` `end`
`strides` etc. work exactly as in `StridedSlice`.
NOTE this op currently does not support broadcasting and so `value`'s shape
must be exactly the shape produced by the slice of `input`.
Args:
* scope: A Scope object
Returns:
* `Output`: The output tensor. */
class TensorStridedSliceUpdate {
public:
/// Optional attribute setters for TensorStridedSliceUpdate
struct Attrs {
/// Defaults to 0
TF_MUST_USE_RESULT Attrs BeginMask(int64 x) {
Attrs ret = *this;
ret.begin_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EndMask(int64 x) {
Attrs ret = *this;
ret.end_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs EllipsisMask(int64 x) {
Attrs ret = *this;
ret.ellipsis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs NewAxisMask(int64 x) {
Attrs ret = *this;
ret.new_axis_mask_ = x;
return ret;
}
/// Defaults to 0
TF_MUST_USE_RESULT Attrs ShrinkAxisMask(int64 x) {
Attrs ret = *this;
ret.shrink_axis_mask_ = x;
return ret;
}
int64 begin_mask_ = 0;
int64 end_mask_ = 0;
int64 ellipsis_mask_ = 0;
int64 new_axis_mask_ = 0;
int64 shrink_axis_mask_ = 0;
};
TensorStridedSliceUpdate(const tensorflow::Scope& scope, tensorflow::Input
input, tensorflow::Input begin, tensorflow::Input
end, tensorflow::Input strides, tensorflow::Input
value);
TensorStridedSliceUpdate(const tensorflow::Scope& scope, tensorflow::Input
input, tensorflow::Input begin, tensorflow::Input
end, tensorflow::Input strides, tensorflow::Input
value, const TensorStridedSliceUpdate::Attrs& attrs);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
static Attrs BeginMask(int64 x) {
return Attrs().BeginMask(x);
}
static Attrs EndMask(int64 x) {
return Attrs().EndMask(x);
}
static Attrs EllipsisMask(int64 x) {
return Attrs().EllipsisMask(x);
}
static Attrs NewAxisMask(int64 x) {
return Attrs().NewAxisMask(x);
}
static Attrs ShrinkAxisMask(int64 x) {
return Attrs().ShrinkAxisMask(x);
}
Operation operation; tensorflow::Output output; };
/** Constructs a tensor by tiling a given tensor.
This operation creates a new tensor by replicating `input` `multiples` times.
The output tensor's i'th dimension has `input.dims(i) * multiples[i]` elements,
and the values of `input` are replicated `multiples[i]` times along the 'i'th
dimension. For example, tiling `[a b c d]` by `[2]` produces
`[a b c d a b c d]`.
>>> a = tf.constant([[1,2,3],[4,5,6]], tf.int32)
>>> b = tf.constant([1,2], tf.int32)
>>> tf.tile(a, b)
>>> c = tf.constant([2,1], tf.int32)
>>> tf.tile(a, c)
>>> d = tf.constant([2,2], tf.int32)
>>> tf.tile(a, d)
Args:
* scope: A Scope object
* input: 1-D or higher.
* multiples: 1-D. Length must be the same as the number of dimensions in `input`
Returns:
* `Output`: The output tensor. */
class Tile {
public:
Tile(const tensorflow::Scope& scope, tensorflow::Input input,
tensorflow::Input multiples);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Shuffle dimensions of x according to a permutation.
The output `y` has the same rank as `x`. The shapes of `x` and `y` satisfy:
`y.shape[i] == x.shape[perm[i]] for i in [0, 1, ..., rank(x) - 1]`
Args:
* scope: A Scope object
Returns:
* `Output`: The y tensor. */
class Transpose {
public:
Transpose(const tensorflow::Scope& scope, tensorflow::Input x,
tensorflow::Input perm);
operator ::tensorflow::Output() const { return y; }
operator ::tensorflow::Input() const { return y; }
::tensorflow::Node* node() const { return y.node(); }
Operation operation; tensorflow::Output y; };
/** Finds unique elements in a 1-D tensor.
This operation returns a tensor `y` containing all of the unique elements of `x`
sorted in the same order that they occur in `x`; `x` does not need to be sorted.
This operation also returns a tensor `idx` the same size as `x` that contains
the index of each value of `x` in the unique output `y`. In other words:
`y[idx[i]] = x[i] for i in [0, 1,...,rank(x) - 1]`
Examples:
tensor 'x' is [1, 1, 2, 4, 4, 4, 7, 8, 8]
y, idx = unique(x) y ==> [1, 2, 4, 7, 8] idx ==> [0, 0, 1, 2, 2, 2, 3, 4, 4]
tensor 'x' is [4, 5, 1, 2, 3, 3, 4, 5]
y, idx = unique(x) y ==> [4, 5, 1, 2, 3] idx ==> [0, 1, 2, 3, 4, 4, 0, 1]
Args:
* scope: A Scope object
* x: 1-D.
Returns:
* `Output` y: 1-D.
* `Output` idx: 1-D. */
class Unique {
public:
/// Optional attribute setters for Unique
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutIdx(DataType x) {
Attrs ret = *this;
ret.out_idx_ = x;
return ret;
}
DataType out_idx_ = DT_INT32; }; Unique(const ::tensorflow::Scope& scope, ::tensorflow::Input x); Unique(const tensorflow::Scope& scope, tensorflow::Input x, const Unique::Attrs& attrs);
static Attrs OutIdx(DataType x) {
return Attrs().OutIdx(x);
}
Operation operation; tensorflow::Output y; tensorflow::Output idx; };
/** Finds unique elements along an axis of a tensor.
This operation either returns a tensor `y` containing unique elements
along the `axis` of a tensor. The returned unique elements is sorted
in the same order as they occur along `axis` in `x`.
This operation also returns a tensor `idx` that is the same size as
the number of the elements in `x` along the `axis` dimension. It
contains the index in the unique output `y`.
In other words, for an `1-D` tensor `x` with `axis = None:
`y[idx[i]] = x[i] for i in [0, 1,...,rank(x) - 1]`
For example:
tensor 'x' is [1, 1, 2, 4, 4, 4, 7, 8, 8]
y, idx = unique(x) y ==> [1, 2, 4, 7, 8] idx ==> [0, 0, 1, 2, 2, 2, 3, 4, 4]
For an `2-D` tensor `x` with `axis = 0`:
tensor 'x' is [[1, 0, 0],
[1, 0, 0],
[2, 0, 0]]
y, idx = unique(x, axis=0) y ==> [[1, 0, 0], [2, 0, 0]] idx ==> [0, 0, 1]
For an `2-D` tensor `x` with `axis = 1`:
tensor 'x' is [[1, 0, 0],
[1, 0, 0],
[2, 0, 0]]
y, idx = unique(x, axis=1) y ==> [[1, 0], [1, 0], [2, 0]] idx ==> [0, 1, 1]
Args:
* scope: A Scope object
* x: A `Tensor`.
* axis: A `Tensor` of type `int32` (default: None). The axis of the Tensor to
find the unique elements.
Returns:
* `Output` y: A `Tensor`. Unique elements along the `axis` of `Tensor` x.
* `Output` idx: A 1-D Tensor. Has the same type as x that contains the index of each
value of x in the output y. */
class UniqueV2 {
public:
/// Optional attribute setters for UniqueV2
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutIdx(DataType x) {
Attrs ret = *this;
ret.out_idx_ = x;
return ret;
}
DataType out_idx_ = DT_INT32; }; UniqueV2(const tensorflow::Scope& scope, tensorflow::Input x, tensorflow::Input axis); UniqueV2(const tensorflow::Scope& scope, tensorflow::Input x, tensorflow::Input axis, const UniqueV2::Attrs& attrs);
static Attrs OutIdx(DataType x) {
return Attrs().OutIdx(x);
}
Operation operation; tensorflow::Output y; tensorflow::Output idx; };
/** Finds unique elements in a 1-D tensor.
This operation returns a tensor `y` containing all of the unique elements of `x`
sorted in the same order that they occur in `x`. This operation also returns a
tensor `idx` the same size as `x` that contains the index of each value of `x`
in the unique output `y`. Finally, it returns a third tensor `count` that
contains the count of each element of `y` in `x`. In other words:
`y[idx[i]] = x[i] for i in [0, 1,...,rank(x) - 1]`
For example:
tensor 'x' is [1, 1, 2, 4, 4, 4, 7, 8, 8]
y, idx, count = unique_with_counts(x) y ==> [1, 2, 4, 7, 8] idx ==> [0, 0, 1, 2, 2, 2, 3, 4, 4] count ==> [2, 1, 3, 1, 2]
Args:
* scope: A Scope object
* x: 1-D.
Returns:
* `Output` y: 1-D.
* `Output` idx: 1-D.
* `Output` count: 1-D. */
class UniqueWithCounts {
public:
/// Optional attribute setters for UniqueWithCounts
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutIdx(DataType x) {
Attrs ret = *this;
ret.out_idx_ = x;
return ret;
}
DataType out_idx_ = DT_INT32; }; UniqueWithCounts(const ::tensorflow::Scope& scope, ::tensorflow::Input x); UniqueWithCounts(const tensorflow::Scope& scope, tensorflow::Input x, const UniqueWithCounts::Attrs& attrs);
static Attrs OutIdx(DataType x) {
return Attrs().OutIdx(x);
}
Operation operation; tensorflow::Output y; tensorflow::Output idx; tensorflow::Output count; };
/** Finds unique elements along an axis of a tensor.
This operation either returns a tensor `y` containing unique elements
along the `axis` of a tensor. The returned unique elements is sorted
in the same order as they occur along `axis` in `x`.
This operation also returns a tensor `idx` and a tensor `count`
that are the same size as the number of the elements in `x` along the
`axis` dimension. The `idx` contains the index in the unique output `y`
and the `count` contains the count in the unique output `y`.
In other words, for an `1-D` tensor `x` with `axis = None:
`y[idx[i]] = x[i] for i in [0, 1,...,rank(x) - 1]`
For example:x = tf.constant([1, 1, 2, 4, 4, 4, 7, 8, 8]) y, idx, count = UniqueWithCountsV2(x, axis = [0]) y ==> [1, 2, 4, 7, 8] idx ==> [0, 0, 1, 2, 2, 2, 3, 4, 4] count ==> [2, 1, 3, 1, 2]
For a `2-D` tensor `x` with `axis = 0`:x = tf.constant([[1, 0, 0], [1, 0, 0], [2, 0, 0]]) y, idx, count = UniqueWithCountsV2(x, axis=[0]) y ==> [[1, 0, 0], [2, 0, 0]] idx ==> [0, 0, 1] count ==> [2, 1]
For a `2-D` tensor `x` with `axis = 1`:x = tf.constant([[1, 0, 0], [1, 0, 0], [2, 0, 0]]) y, idx, count = UniqueWithCountsV2(x, axis=[1]) y ==> [[1, 0], [1, 0], [2, 0]] idx ==> [0, 1, 1] count ==> [1, 2]
Args:
* scope: A Scope object
* x: A `Tensor`.
* axis: A `Tensor` of type `int32` (default: None). The axis of the Tensor to
find the unique elements.
Returns:
* `Output` y: A `Tensor`. Unique elements along the `axis` of `Tensor` x.
* `Output` idx: A 1-D Tensor. Has the same type as x that contains the index of each
value of x in the output y.
* `Output` count: A 1-D Tensor. The count of each value of x in the output y. */
class UniqueWithCountsV2 {
public:
/// Optional attribute setters for UniqueWithCountsV2
struct Attrs {
/// Defaults to DT_INT32
TF_MUST_USE_RESULT Attrs OutIdx(DataType x) {
Attrs ret = *this;
ret.out_idx_ = x;
return ret;
}
DataType out_idx_ = DT_INT32; }; UniqueWithCountsV2(const tensorflow::Scope& scope, tensorflow::Input x, tensorflow::Input axis); UniqueWithCountsV2(const tensorflow::Scope& scope, tensorflow::Input x, tensorflow::Input axis, const UniqueWithCountsV2::Attrs& attrs);
static Attrs OutIdx(DataType x) {
return Attrs().OutIdx(x);
}
Operation operation; tensorflow::Output y; tensorflow::Output idx; tensorflow::Output count; };
/** Unpacks a given dimension of a rank-`R` tensor into `num` rank-`(R-1)` tensors.
Unpacks `num` tensors from `value` by chipping it along the `axis` dimension.
For example, given a tensor of shape `(A, B, C, D)`;
If `axis == 0` then the i'th tensor in `output` is the slice `value[i, :, :, :]`
and each tensor in `output` will have shape `(B, C, D)`. (Note that the
dimension unpacked along is gone, unlike `split`).
If `axis == 1` then the i'th tensor in `output` is the slice `value[:, i, :, :]`
and each tensor in `output` will have shape `(A, C, D)`.
Etc.
This is the opposite of `pack`.
Args:
* scope: A Scope object
* value: 1-D or higher, with `axis` dimension size equal to `num`.
Optional attributes (see `Attrs`):
* axis: Dimension along which to unpack. Negative values wrap around, so the
valid range is `[-R, R)`.
Returns:
* `OutputList`: The list of tensors unpacked from `value`. */
class Unstack {
public:
/// Optional attribute setters for Unstack
struct Attrs {
/** Dimension along which to unpack. Negative values wrap around, so the
valid range is `[-R, R)`.
Defaults to 0 */
TF_MUST_USE_RESULT Attrs Axis(int64 x) {
Attrs ret = *this;
ret.axis_ = x;
return ret;
}
int64 axis_ = 0; }; Unstack(const ::tensorflow::Scope& scope, ::tensorflow::Input value, int64 num); Unstack(const tensorflow::Scope& scope, tensorflow::Input value, int64 num, const Unstack::Attrs& attrs); tensorflow::Output operator[](size_t index) const { return output[index]; }
static Attrs Axis(int64 x) {
return Attrs().Axis(x);
}
Operation operation; ::tensorflow::OutputList output; };
/** Converts an array of flat indices into a tuple of coordinate arrays.
Example:y = tf.unravel_index(indices=[2, 5, 7], dims=[3, 3])
'dims' represent a hypothetical (3, 3) tensor of indices:
[[0, 1, 2],
[3, 4, 5],
[6, 7, 8]]
For each entry from 'indices', this operation returns
its coordinates (marked with '*'), such as
2 ==> (0, 2)
5 ==> (1, 2)
7 ==> (2, 1)
y ==> [[0, 1, 2], [2, 2, 1]]
(numpy)
Equivalent to np.unravel_index
Args:
* scope: A Scope object
* indices: An 0-D or 1-D `int` Tensor whose elements are indices into the
flattened version of an array of dimensions dims.
* dims: An 1-D `int` Tensor. The shape of the array to use for unraveling
indices.
Returns:
* `Output`: An 2-D (or 1-D if indices is 0-D) tensor where each row has the
same shape as the indices array. */
class UnravelIndex {
public:
UnravelIndex(const tensorflow::Scope& scope, tensorflow::Input indices,
tensorflow::Input dims);
operator ::tensorflow::Output() const { return output; }
operator ::tensorflow::Input() const { return output; }
::tensorflow::Node* node() const { return output.node(); }
Operation operation; tensorflow::Output output; };
/** Returns locations of nonzero / true values in a tensor.
This operation returns the coordinates of true elements in `condition`. The
coordinates are returned in a 2-D tensor where the first dimension (rows)
represents the number of true elements, and the second dimension (columns)
represents the coordinates of the true elements. Keep in mind, the shape of
the output tensor can vary depending on how many true values there are in
`condition`. Indices are output in row-major order.
For example:
'input' tensor is [[True, False]
[True, False]]
'input' has two true values, so output has two coordinates.
'input' has rank of 2, so coordinates have two indices.
where(input) ==> [[0, 0], [1, 0]]
condition tensor is [[[True, False]
[True, False]]
[[False, True]
[False, True]]
[[False, False]
[False, True]]]
'input' has 5 true values, so output has 5 coordinates.
'input' has rank of 3, so coordinates have three indices.
where(input) ==> [[0, 0, 0], [0, 1, 0], [1, 0, 1], [1, 1, 1], [2, 1, 1]]
condition tensor is [[[1.5, 0.0]
[-0.5, 0.0]]
[[0.0, 0.25]
[0.0, 0.75]]
[[0.0, 0.0]
[0.0, 0.01]]]
'input' has 5 nonzero values, so output has 5 coordinates.
'input' has rank of 3, so coordinates have three indices.
where(input) ==> [[0, 0, 0], [0, 1, 0], [1, 0, 1], [1, 1, 1], [2, 1, 1]]
condition tensor is [[[1.5 + 0.0j, 0.0 + 0.0j]
[0.0 + 0.5j, 0.0 + 0.0j]]
[[0.0 + 0.0j, 0.25 + 1.5j]
[0.0 + 0.0j, 0.75 + 0.0j]]
[[0.0 + 0.0j, 0.0 + 0.0j]
[0.0 + 0.0j, 0.01 + 0.0j]]]
'input' has 5 nonzero magnitude values, so output has 5 coordinates.
'input' has rank of 3, so coordinates have three indices.
where(input) ==> [[0, 0, 0], [0, 1, 0], [1, 0, 1], [1, 1, 1], [2, 1, 1]] ```
Args:
- scope: A Scope object
Returns:
Output: The index tensor.
Constructors and Destructors |
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Where(const ::tensorflow::Scope & scope, ::tensorflow::Input condition)
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Public attributes |
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index
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operation
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Public functions |
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node() const
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::tensorflow::Node *
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operator::tensorflow::Input() const
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operator::tensorflow::Output() const
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Public attributes
index
::tensorflow::Output index
operation
Operation operation
Public functions
Where
Where( const ::tensorflow::Scope & scope, ::tensorflow::Input condition )
node
::tensorflow::Node * node() const
operator::tensorflow::Input
operator::tensorflow::Input() const
operator::tensorflow::Output
operator::tensorflow::Output() const