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How to do this

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Ram k
Ram k 2016-7-5
关闭： MATLAB Answer Bot 2021-8-20
Suppose I have a matrix with some entries zero and some are nonzero.
0.36 0 0.9 0.4
0.26 0.1 0 0
0.5 0 0 0.8
0.6 0.75 0.4 0.88
I have to take log of nonzero numbers and then I have to add it, i.e. log(0.36)+log(0.9)+log(0.4)+log(0.26)+log(0.1)+log(0.5)+log(0.8)+log(0.6)+log(0.75)+log(0.4)+log(0.88), how to do.

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回答（1 个）

Thorsten
Thorsten 2016-7-5
A = [0.36 0 0.9 0.4
0.26 0.1 0 0
0.5 0 0 0.8
0.6 0.75 0.4 0.88];
sum(log(A(A ~= 0))

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