Gather

public final class Gather

Gather slices from `params` axis `axis` according to `indices`.

`indices` must be an integer tensor of any dimension (usually 0-D or 1-D). Produces an output tensor with shape `params.shape[:axis] + indices.shape[batch_dims:] + params.shape[axis + 1:]` where:

# Scalar indices (output is rank(params) - 1).
     output[a_0, ..., a_n, b_0, ..., b_n] =
       params[a_0, ..., a_n, indices, b_0, ..., b_n]
 
     # Vector indices (output is rank(params)).
     output[a_0, ..., a_n, i, b_0, ..., b_n] =
       params[a_0, ..., a_n, indices[i], b_0, ..., b_n]
 
     # Higher rank indices (output is rank(params) + rank(indices) - 1).
     output[a_0, ..., a_n, i, ..., j, b_0, ... b_n] =
       params[a_0, ..., a_n, indices[i, ..., j], b_0, ..., b_n]

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, a 0 is stored in the corresponding output value.

See also `tf.batch_gather` and tf.gather_nd.

Nested Classes

class Gather.Options Optional attributes for Gather

Constants

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

Public Methods

Output<T>	asOutput() Returns the symbolic handle of the tensor.
static Gather.Options	batchDims(Long batchDims)
static <T extends TType> Gather<T>	create(Scope scope, Operand<T> params, Operand<? extends TNumber> indices, Operand<? extends TNumber> axis, Options... options) Factory method to create a class wrapping a new Gather operation.
Output<T>	output() Values from `params` gathered from indices given by `indices`, with shape `params.shape[:axis] + indices.shape + params.shape[axis + 1:]`.

Inherited Methods

From class 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()

From class java.lang.Object

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()

From interface 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`.

From interface 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

From interface 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: "GatherV2"

Public Methods

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 Gather.Options batchDims (Long batchDims)

public static Gather<T> create (Scope scope, Operand<T> params, Operand<? extends TNumber> indices, Operand<? extends TNumber> axis, Options... options)

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

Parameters

scope	current scope
params	The tensor from which to gather values. Must be at least rank `axis + 1`.
indices	Index tensor. Must be in range `[0, params.shape[axis])`.
axis	The axis in `params` to gather `indices` from. Defaults to the first dimension. Supports negative indexes.
options	carries optional attributes values

Returns

a new instance of Gather

public Output<T> output ()

Values from `params` gathered from indices given by `indices`, with shape `params.shape[:axis] + indices.shape + params.shape[axis + 1:]`.