# How do you set entries in a matrix for odd rows with odd columns to zero?

2 views (last 30 days)
L'O.G. on 15 Feb 2023
Answered: Dyuman Joshi on 15 Feb 2023
I want to set A(i,j) = 0 if both i and j are odd. Is this possible to do vectorially?

Dyuman Joshi on 15 Feb 2023
%random data for example
A = rand(6,7)
A = 6×7
0.5610 0.2871 0.6280 0.3569 0.2765 0.5197 0.9541 0.3110 0.6573 0.3447 0.8105 0.0255 0.8263 0.2238 0.1450 0.6944 0.2345 0.6517 0.8826 0.6646 0.2389 0.0189 0.9227 0.6658 0.1392 0.9954 0.4346 0.1812 0.2084 0.3130 0.1589 0.8685 0.6272 0.6153 0.3176 0.9900 0.3501 0.1301 0.0931 0.5342 0.8533 0.5644
A(1:2:end,1:2:end)=0
A = 6×7
0 0.2871 0 0.3569 0 0.5197 0 0.3110 0.6573 0.3447 0.8105 0.0255 0.8263 0.2238 0 0.6944 0 0.6517 0 0.6646 0 0.0189 0.9227 0.6658 0.1392 0.9954 0.4346 0.1812 0 0.3130 0 0.8685 0 0.6153 0 0.9900 0.3501 0.1301 0.0931 0.5342 0.8533 0.5644

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