How to work with arrays with values of Log(0)?

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Jacinto Elias Sedeño-Díaz
回答： David Hill 2020-12-8
I am working with arrays that include zero values. One transformation I must do is apply logarithms to each value in the matrix. In the result, I need to do other operations but I have to skip the values that do not have a result of the logarithm. How can I do that?
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回答（1 个）

David Hill
David Hill 2020-12-8
a=log(initialArray);
idx=initialArray~=0;
a(idx)=5*a(idx);%other calculations only perform on non-zero values of initial array

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