Numpy Array operation Y[ ..., 0]

Question

Just a quick question,

I came across a NumPy array operation which is important for the code and i cannot understand what this does.

Probs = Y[ ... , 0]

Code for reference Python code

Any help will be appreciated.

It's a dimension placeholder. See https://stackoverflow.com/questions/772124/what-does-the-ellipsis-object-do — Jussi Nurminen, Feb 18 '20 at 13:24

score 0 · Accepted Answer · answered Feb 18 '20 at 12:58

0

In a 2d numpy array this should give you the first element of each nested list, so for example:

import numpy as np
Y = np.asarray([[1,2,3,4], [1,2,3,4], [2,3,4,5]])
Y[..., 0]
>>> array([1, 1, 2])

answered Feb 18 '20 at 12:58

nickyfot

1 Answers1