如何在Tensorflow中进行列总和? [英] How to do a column sum in Tensorflow?

问题描述

Tensorflow中的以下等效项是什么?

What is the equivalent of the following in Tensorflow?

np.sum(A, axis=1)

推荐答案

有tf.reduce_sum，它是执行此操作的更强大的工具.

There is tf.reduce_sum which is a bit more powerfull tool for doing so.

# 'x' is [[1, 1, 1]
#         [1, 1, 1]]
tf.reduce_sum(x) ==> 6
tf.reduce_sum(x, 0) ==> [2, 2, 2]
tf.reduce_sum(x, 1) ==> [3, 3]
tf.reduce_sum(x, 1, keep_dims=True) ==> [[3], [3]]
tf.reduce_sum(x, [0, 1]) ==> 6

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