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How to calculate coefficient of variation for every element in Matrix?

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Saad Alqahtani 2021-8-2

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评论： Saad Alqahtani 2021-8-2

Hi,

I'm trying to calculate coefficient of variation for every elemnt in an array but I kept getting this error:

Error using reshape

Product of known dimensions, 521250, not divisible into total number of elements, 1.

here is my code:

(datan) is my raw data with the length of 521250

tm= ceil(length (datan));

mn= mean(reshape([datan(:)],tm,[]));

sd=std(reshape([datan(:)],tm,[]));

cv=reshape((sd./mn)*100,[],tm);

Any help would be appreciated. Thanks in advance!

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回答（1 个）

David Hill 2021-8-2

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https://ww2.mathworks.cn/matlabcentral/answers/890937-how-to-calculate-coefficient-of-variation-for-every-element-in-matrix#answer_759252

在 MATLAB Online 中打开

cv=std(datan,0,'all')/mean(datan,'all');

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Saad Alqahtani 2021-8-2

Thanks for the answer. But I'm hoping to get an array of cv as the same size as the datan. So, my ultimate goal is tha I can see how the cv changes over time. However, from the line I got from you, I only get one value which is not what I'm trying to do. Thanks again.

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