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# Loading multiple .mat or Excel files and maniplulate them in a double for loop

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Christina on 28 May 2015
Closed: MATLAB Answer Bot on 20 Aug 2021
Hello,
I've got 3 .mat files, saved in an excel format as well with a size each 4x1.
These are var1, var2 and var3.
I'd like to load those three .mat files within a for loop and then multiply them by a vector with changing values (hence the double for loop) and at the end create a single .mat file.
My code until now looks like
n=3
A=4
for i=1:n
fr= fractions(:,i)./sum(fractions(:,1:n),2) %%where the fractions matrix is a 4*3 matrix
load(['var' int2str(i)]) %%%I assume I need something additional here
for j=1:A
Var = ???
% I want to multiply fr(j) by each var, i.e. I'd like to
multiply fr(j) for i=1 with var1, then for the second
external loop I want to multiply fr(j) for i=2 with var2
and so on
end
end
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dpb on 28 May 2015
Edited: dpb on 28 May 2015
fr=bxsfun(@rdivide,fractions,sum(fractions,2)); % ratios
for i=1:N % get the three arrays