Computes the sum along segments of a tensor.
tf.math.segment_sum(
data, segment_ids, name=None
)
Read the section on segmentation for an explanation of segments.
Computes a tensor such that
\(output_i = \sum_j data_j\) where sum is over j
such
that segment_ids[j] == i
.
If the sum is empty for a given segment ID i
, output[i] = 0
.
![](https://tensorflow.google.cn/images/SegmentSum.png?authuser=5)
For example:
c = tf.constant([[1,2,3,4], [4, 3, 2, 1], [5,6,7,8]])
tf.math.segment_sum(c, tf.constant([0, 0, 1]))
# ==> [[5, 5, 5, 5],
# [5, 6, 7, 8]]
Returns | |
---|---|
A Tensor . Has the same type as data .
|