tensorflow::ops::ParallelDynamicStitch

#include <data_flow_ops.h>

Interleave the values from the data tensors into a single tensor.

Summary

Builds a merged tensor such that

```python merged[indices[m][i, ..., j], ...] = data[m][i, ..., j, ...] ```

For example, if each indices[m] is scalar or vector, we have

```python Scalar indices:

merged[indices[m], ...] = data[m][...]

Vector indices:

merged[indices[m][i], ...] = data[m][i, ...] ```

Each data[i].shape must start with the corresponding indices[i].shape, and the rest of data[i].shape must be constant w.r.t. i. That is, we must have data[i].shape = indices[i].shape + constant. In terms of this constant, the output shape is

merged.shape = [max(indices)] + constant

Values may be merged in parallel, so if an index appears in both indices[m][i] and indices[n][j], the result may be invalid. This differs from the normal DynamicStitch operator that defines the behavior in that case.

For example:

```python indices[0] = 6 indices[1] = [4, 1] indices[2] = [[5, 2], [0, 3]] data[0] = [61, 62] data[1] = [[41, 42], [11, 12]] data[2] = [[[51, 52], [21, 22]], [[1, 2], [31, 32]]] merged = [[1, 2], [11, 12], [21, 22], [31, 32], [41, 42], [51, 52], [61, 62]] ```

This method can be used to merge partitions created by dynamic_partition as illustrated on the following example:

```python Apply function (increments x_i) on elements for which a certain condition

apply (x_i != -1 in this example).

x=tf.constant([0.1, -1., 5.2, 4.3, -1., 7.4]) condition_mask=tf.not_equal(x,tf.constant(-1.)) partitioned_data = tf.dynamic_partition( x, tf.cast(condition_mask, tf.int32) , 2) partitioned_data[1] = partitioned_data[1] + 1.0 condition_indices = tf.dynamic_partition( tf.range(tf.shape(x)[0]), tf.cast(condition_mask, tf.int32) , 2) x = tf.dynamic_stitch(condition_indices, partitioned_data) Here x=[1.1, -1., 6.2, 5.3, -1, 8.4], the -1. values remain

unchanged.

```

Arguments:

• scope: A Scope object

Returns:

• Output: The merged tensor.

Public attributes

::tensorflow::Output merged

Public functions

 ParallelDynamicStitch(
  const ::tensorflow::Scope & scope,
  ::tensorflow::InputList indices,
  ::tensorflow::InputList data
)

::tensorflow::Node * node() const 

operator::tensorflow::Input() const 

operator::tensorflow::Output() const