How do I index a numpy array of zeroes with a boolean datatype to True?

Question

So I\'m recreating a Matlab project they made last year, part of which involves creating mask that pull out the RGB bands. They did this by an array of logical zeroes.

Answer 1

You can translate Matlab's

GMask_Whole(1:2:end,2:2:end) = true;

to python by

green_mask_whole[::2,1::2] = True

(assuming green_mask_whole is a numpy array)