/TensorFlow C++

# tensorflow::ops::SparseSegmentSum

`#include <math_ops.h>`

Computes the sum along sparse segments of a tensor.

## Summary

Read the section on segmentation for an explanation of segments.

Like `SegmentSum`, but `segment_ids` can have rank less than `data`'s first dimension, selecting a subset of dimension 0, specified by `indices`.

For example:

```python c = tf.constant([[1,2,3,4], [-1,-2,-3,-4], [5,6,7,8]])

Select two rows, one segment.

tf.sparse_segment_sum(c, tf.constant([0, 1]), tf.constant([0, 0])) => [[0 0 0 0]]

Select two rows, two segment.

tf.sparse_segment_sum(c, tf.constant([0, 1]), tf.constant([0, 1])) => [[ 1 2 3 4]

[-1 -2 -3 -4]]

Select all rows, two segments.

tf.sparse_segment_sum(c, tf.constant([0, 1, 2]), tf.constant([0, 0, 1])) => [[0 0 0 0]

[5 6 7 8]]

Which is equivalent to:

tf.segment_sum(c, tf.constant([0, 0, 1])) ```

Arguments:

• scope: A Scope object
• indices: A 1-D tensor. Has same rank as `segment_ids`.
• segment_ids: A 1-D tensor. Values should be sorted and can be repeated.

Returns:

• `Output`: Has same shape as data, except for dimension 0 which has size `k`, the number of segments.
Constructors and Destructors
`SparseSegmentSum(const ::tensorflow::Scope & scope, ::tensorflow::Input data, ::tensorflow::Input indices, ::tensorflow::Input segment_ids)`
Public attributes
`output`
`::tensorflow::Output`
Public functions
`node() const `
`::tensorflow::Node *`
`operator::tensorflow::Input() const `
`operator::tensorflow::Output() const `

## Public attributes

### output

`::tensorflow::Output output`

## Public functions

### SparseSegmentSum

``` SparseSegmentSum(
const ::tensorflow::Scope & scope,
::tensorflow::Input data,
::tensorflow::Input indices,
::tensorflow::Input segment_ids
)```

### node

`::tensorflow::Node * node() const `

### operator::tensorflow::Input

`operator::tensorflow::Input() const `

### operator::tensorflow::Output

`operator::tensorflow::Output() const `

© 2017 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/api_docs/cc/class/tensorflow/ops/sparse-segment-sum.html