What is the meaning of any_image(:,w:-1:1) in MATLAB

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I have seen this line in a program, but couldn't understand what it means. As far as i know, the first part means 'for all rows' but i didn't understand
w:-1:1
this part.

Accepted Answer

Marcel Kreuzberg
Marcel Kreuzberg on 12 Nov 2019
w:-1:1 start with w step -1 till 1
6:-1:1 -> 6 5 4 3 2 1

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