How can I find the mean of multiple variables in for loop

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NA
NA 2022-11-7
编辑： John D'Errico 2022-11-7
Hi,
I have 10 workspace variables (A1, A2 ....A10), each have different dimensions. I would like to find the mean of each variable but I'm not sure how to do it.
for i=1:10 %A1 ...A10
meanA(i) = mean(A); %not sure what to write here for 1:10
end
Would appreciate your help.
Thanks

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回答（2 个）

John D'Errico
John D'Errico 2022-11-7
编辑：John D'Errico 2022-11-7
You have asked 22 questions so far, and are still numbering your variables? This is yet another reason for why you need to learn MATLAB as a matrix language. Learn to use vectors and arrays of vectors, etc. DON'T name and number your variables, as if you are still using a spreadsheet. MATLAB is not a spreadsheet.
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
Store all of those variables in ONE array. Then it requires nothing more than one call to the function mean, to compute the mean of ALL of your vectors at once.
Matt J
Matt J 2022-11-7
Ran in:
For example,
Arrays={rand(2), rand(3), eye(10), randn(15)}
Arrays = 1×4 cell array
{2×2 double} {3×3 double} {10×10 double} {15×15 double}
Means=cellfun(@(z)mean(z,'all') , Arrays)
Means = 1×4
0.7548 0.6077 0.1000 0.0492

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