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How to replace the non zero values of a matrix with another value?

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How to replace the non zero values of a matrix with another value?
If there is a matrix 5*5 and it contains zero values, how can I keep the zero values and replace the non zero value with 0.1?
in matlab version R2018a

Accepted Answer

John D'Errico
John D'Errico on 27 Apr 2023
Edited: John D'Errico on 27 Apr 2023
A(A ~= 0) == 0.1;
One line of code. That applies to ANY release of MATLAB. As far back as I have been using MATLAB, so only back about 35 years or so.
And of course, there are other equally simple ways to solve it. For example:
A = (A ~= 0)*0.1;

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