how to insert diganole of zeros in to matrix without using loops ?

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tomer polsky on 3 Mar 2019

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Edited: madhan ravi on 3 Mar 2019

Accepted Answer: madhan ravi

my question is simple how to change the main diagonel of nXn of random numers and change the main diagonle to zeroes ?

without using loops ?

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madhan ravi on 3 Mar 2019

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a(logical(eye(size(a,1))))=0 % where a is your matrix

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tomer polsky on 3 Mar 2019

thank you for your help but why did you use the logical command ?

madhan ravi on 3 Mar 2019

Edited: madhan ravi on 3 Mar 2019

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logical indexing

Alternative (faster):

a(1:size(a,1)+1:end)=0

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