Unique

public final class Unique

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]

Constants

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

Public Methods

static <T extends TType, V extends TNumber> Unique<T, V>
create(Scope scope, Operand<T> x, Operand<? extends TNumber> axis, Class<V> outIdx)
Factory method to create a class wrapping a new Unique operation.
static <T extends TType> Unique<T, TInt32>
create(Scope scope, Operand<T> x, Operand<? extends TNumber> axis)
Factory method to create a class wrapping a new Unique operation using default output types.
Output<V>
idx()
A 1-D Tensor.
Output<T>
y()
A `Tensor`.

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.

Constants

public static final String OP_NAME

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

Constant Value: "UniqueV2"

Public Methods

public static Unique<T, V> create (Scope scope, Operand<T> x, Operand<? extends TNumber> axis, Class<V> outIdx)

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

Parameters
scope current scope
x A `Tensor`.
axis A `Tensor` of type `int32` (default: None). The axis of the Tensor to find the unique elements.
Returns
  • a new instance of Unique

public static Unique<T, TInt32> create (Scope scope, Operand<T> x, Operand<? extends TNumber> axis)

Factory method to create a class wrapping a new Unique operation using default output types.

Parameters
scope current scope
x A `Tensor`.
axis A `Tensor` of type `int32` (default: None). The axis of the Tensor to find the unique elements.
Returns
  • a new instance of Unique

public Output<V> idx ()

A 1-D Tensor. Has the same type as x that contains the index of each value of x in the output y.

public Output<T> y ()

A `Tensor`. Unique elements along the `axis` of `Tensor` x.