Select values from martix with an absolute value and set them to zero.

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Benjamin Nienhouse 2020-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/615688-select-values-from-martix-with-an-absolute-value-and-set-them-to-zero

评论： Benjamin Nienhouse 2020-10-16

So I'm having trouble with this, my goal is to select values from my random 6x6 matrix (ranging from [-10,10]) with an absolute value of 5 and set them equal to zero.

Any advice, I'm new to Matlab as of recently and don't know what I'm doing half the time.

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Akira Agata 2020-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/615688-select-values-from-martix-with-an-absolute-value-and-set-them-to-zero#answer_515413

Like this?

A = randi([-10 10],6);  % 6x6 matrix (ranging from [-10,10])
idx = abs(A) == 5;      % Find elements whose absolute value == 5
A(idx) = 0;             % Set them to 0