How to sort in descending order with numpy?

Question

I have a numpy array like this:

A = array([[1, 3, 2, 7],
           [2, 4, 1, 3],
           [6, 1, 2, 3]])

I would like to sort the rows of th

Answer 1

Just multiply your matrix by -1 to reverse order:

[In]: A = np.array([[1, 3, 2, 7],
                    [2, 4, 1, 3],
                    [6, 1, 2, 3]])
[In]: print( np.argsort(-A) )
[Out]: [[3 1 2 0]
        [1 3 0 2]
        [0 3 2 1]]