python - How to Argsort in Tensorflow?

Question

How can I argsort a 25 x 5 x 5 matrix (tensor) along the 2nd axis? Essentially, I am looking for tensorflow's equivalent (function or methodology) to numpy's argsort, e.g. np.argsort(matrix, 2).

Answer 1

In your case you could probably use top_k which returns the highest k values. k can be a 1D vector defining how many values to 'top' per dimensions. In your case, if you want the second axis set k=[0, 5, 0] might do it.

tf.nn.top_k(matrix, k=[0,5,0], sorted=True)

I didn't run it tho. Hope this helps