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

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I want to set A(i,j) = 0 if both i and j are odd. Is this possible to do vectorially?

Accepted Answer

Dyuman Joshi
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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