MatrixSetDiag

public final class MatrixSetDiag

Returns a batched matrix tensor with new batched diagonal values.

Given `input` and `diagonal`, this operation returns a tensor with the same shape and values as `input`, except for the specified diagonals of the innermost matrices. These will be overwritten by the values in `diagonal`.

`input` has `r+1` dimensions `[I, J, ..., L, M, N]`. When `k` is scalar or `k[0] == k[1]`, `diagonal` has `r` dimensions `[I, J, ..., L, max_diag_len]`. Otherwise, it has `r+1` dimensions `[I, J, ..., L, num_diags, max_diag_len]`. `num_diags` is the number of diagonals, `num_diags = k[1] - k[0] + 1`. `max_diag_len` is the longest diagonal in the range `[k[0], k[1]]`, `max_diag_len = min(M + min(k[1], 0), N + min(-k[0], 0))`

The output is a tensor of rank `k+1` with dimensions `[I, J, ..., L, M, N]`. If `k` is scalar or `k[0] == k[1]`: 

output[i, j, ..., l, m, n]
   = diagonal[i, j, ..., l, n-max(k[1], 0)] ; if n - m == k[1]
     input[i, j, ..., l, m, n]              ; otherwise
Otherwise, 
output[i, j, ..., l, m, n]
   = diagonal[i, j, ..., l, diag_index, index_in_diag] ; if k[0] <= d <= k[1]
     input[i, j, ..., l, m, n]                         ; otherwise
where `d = n - m`, `diag_index = k[1] - d`, and `index_in_diag = n - max(d, 0) + offset`.

`offset` is zero except when the alignment of the diagonal is to the right. 

offset = max_diag_len - diag_len(d) ; if (`align` in {RIGHT_LEFT, RIGHT_RIGHT
                                            and `d >= 0`) or
                                          (`align` in {LEFT_RIGHT, RIGHT_RIGHT}
                                            and `d <= 0`)
          0                          ; otherwise
 }
 where `diag_len(d) = min(cols - max(d, 0), rows + min(d, 0))`.

For example: 

# The main diagonal.
 input = np.array([[[7, 7, 7, 7],              # Input shape: (2, 3, 4)
                    [7, 7, 7, 7],
                    [7, 7, 7, 7]],
                   [[7, 7, 7, 7],
                    [7, 7, 7, 7],
                    [7, 7, 7, 7]]])
 diagonal = np.array([[1, 2, 3],               # Diagonal shape: (2, 3)
                      [4, 5, 6]])
 tf.matrix_set_diag(input, diagonal)
   ==> [[[1, 7, 7, 7],  # Output shape: (2, 3, 4)
         [7, 2, 7, 7],
         [7, 7, 3, 7]],
        [[4, 7, 7, 7],
         [7, 5, 7, 7],
         [7, 7, 6, 7]]]
 
 # A superdiagonal (per batch).
 tf.matrix_set_diag(input, diagonal, k = 1)
   ==> [[[7, 1, 7, 7],  # Output shape: (2, 3, 4)
         [7, 7, 2, 7],
         [7, 7, 7, 3]],
        [[7, 4, 7, 7],
         [7, 7, 5, 7],
         [7, 7, 7, 6]]]
 
 # A band of diagonals.
 diagonals = np.array([[[0, 9, 1],  # Diagonal shape: (2, 4, 3)
                        [6, 5, 8],
                        [1, 2, 3],
                        [4, 5, 0]],
                       [[0, 1, 2],
                        [5, 6, 4],
                        [6, 1, 2],
                        [3, 4, 0]]])
 tf.matrix_set_diag(input, diagonals, k = (-1, 2))
   ==> [[[1, 6, 9, 7],  # Output shape: (2, 3, 4)
         [4, 2, 5, 1],
         [7, 5, 3, 8]],
        [[6, 5, 1, 7],
         [3, 1, 6, 2],
         [7, 4, 2, 4]]]
 
 # LEFT_RIGHT alignment.
 diagonals = np.array([[[9, 1, 0],  # Diagonal shape: (2, 4, 3)
                        [6, 5, 8],
                        [1, 2, 3],
                        [0, 4, 5]],
                       [[1, 2, 0],
                        [5, 6, 4],
                        [6, 1, 2],
                        [0, 3, 4]]])
 tf.matrix_set_diag(input, diagonals, k = (-1, 2), align="LEFT_RIGHT")
   ==> [[[1, 6, 9, 7],  # Output shape: (2, 3, 4)
         [4, 2, 5, 1],
         [7, 5, 3, 8]],
        [[6, 5, 1, 7],
         [3, 1, 6, 2],
         [7, 4, 2, 4]]]

Nested Classes

class MatrixSetDiag.Options Optional attributes for MatrixSetDiag  

Constants

String OP_NAME The name of this op, as known by TensorFlow core engine

Public Methods

static MatrixSetDiag.Options
align(String align)
Output<T>
asOutput()
Returns the symbolic handle of the tensor.
static <T extends TType> MatrixSetDiag<T>
create(Scope scope, Operand<T> input, Operand<T> diagonal, Operand<TInt32> k, Options... options)
Factory method to create a class wrapping a new MatrixSetDiag operation.
Output<T>
output()
Rank `r+1`, with `output.shape = input.shape`.

Inherited Methods

org.tensorflow.op.RawOp
final boolean
equals(Object obj)
final int
hashCode()
Operation
op()
Return this unit of computation as a single Operation.
final String
toString()
boolean
equals(Object arg0)
final Class<?>
getClass()
int
hashCode()
final void
notify()
final void
notifyAll()
String
toString()
final void
wait(long arg0, int arg1)
final void
wait(long arg0)
final void
wait()
org.tensorflow.op.Op
abstract ExecutionEnvironment
env()
Return the execution environment this op was created in.
abstract Operation
op()
Return this unit of computation as a single Operation.
org.tensorflow.Operand
abstract Output<T>
asOutput()
Returns the symbolic handle of the tensor.
abstract T
asTensor()
Returns the tensor at this operand.
abstract Shape
shape()
Returns the (possibly partially known) shape of the tensor referred to by the Output of this operand.
abstract Class<T>
type()
Returns the tensor type of this operand
org.tensorflow.ndarray.Shaped
abstract int
rank()
abstract Shape
shape()
abstract long
size()
Computes and returns the total size of this container, in number of values.

Constants

public static final String OP_NAME

The name of this op, as known by TensorFlow core engine

Constant Value: "MatrixSetDiagV3"

Public Methods

public static MatrixSetDiag.Options align (String align)

Parameters
align Some diagonals are shorter than `max_diag_len` and need to be padded. `align` is a string specifying how superdiagonals and subdiagonals should be aligned, respectively. There are four possible alignments: "RIGHT_LEFT" (default), "LEFT_RIGHT", "LEFT_LEFT", and "RIGHT_RIGHT". "RIGHT_LEFT" aligns superdiagonals to the right (left-pads the row) and subdiagonals to the left (right-pads the row). It is the packing format LAPACK uses. cuSPARSE uses "LEFT_RIGHT", which is the opposite alignment.

public Output<T> asOutput ()

Returns the symbolic handle of the tensor.

Inputs to TensorFlow operations are outputs of another TensorFlow operation. This method is used to obtain a symbolic handle that represents the computation of the input.

public static MatrixSetDiag<T> create (Scope scope, Operand<T> input, Operand<T> diagonal, Operand<TInt32> k, Options... options)

Factory method to create a class wrapping a new MatrixSetDiag operation.

Parameters
scope current scope
input Rank `r+1`, where `r >= 1`.
diagonal Rank `r` when `k` is an integer or `k[0] == k[1]`. Otherwise, it has rank `r+1`. `k >= 1`.
k Diagonal offset(s). Positive value means superdiagonal, 0 refers to the main diagonal, and negative value means subdiagonals. `k` can be a single integer (for a single diagonal) or a pair of integers specifying the low and high ends of a matrix band. `k[0]` must not be larger than `k[1]`.
options carries optional attributes values
Returns
  • a new instance of MatrixSetDiag

public Output<T> output ()

Rank `r+1`, with `output.shape = input.shape`.