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

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tomer polsky 2019-3-3

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https://ww2.mathworks.cn/matlabcentral/answers/447950-how-to-insert-diganole-of-zeros-in-to-matrix-without-using-loops

编辑： madhan ravi 2019-3-3

采纳的回答： 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 2019-3-3

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在 MATLAB Online 中打开

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

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tomer polsky 2019-3-3

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

madhan ravi 2019-3-3

编辑：madhan ravi 2019-3-3

在 MATLAB Online 中打开

logical indexing

Alternative (faster):

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

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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