How can I do multiple regression (i = 1:15) in a loop?

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Simon 2013-5-27

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https://ww2.mathworks.cn/matlabcentral/answers/77124-how-can-i-do-multiple-regression-i-1-15-in-a-loop

I got a matrix A (1x15) with each cell containing 524 x 4 of data, and a Y matrix containing 524 x1 data. I was going for :

For i = 1:15
mdl{i} = LinearModel.fit(A{1,i},Y)
end

but it didn't work

Thanks in advance!

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Simon 2013-5-28

It seems to work but i end up having a 1x15 matrix of mdl, but all cells are empty... it's weird

Simon 2013-5-28

No error message :/

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the cyclist 2013-5-28

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https://ww2.mathworks.cn/matlabcentral/answers/77124-how-can-i-do-multiple-regression-i-1-15-in-a-loop#answer_86818

在 MATLAB Online 中打开

This worked for me:

% Some pretend data
A = cell(1,15);
for i=1:15
    A{i} = rand(524,4);
end
Y = rand(524,1);
% Do the fits
for i = 1:15
    mdl{i} = LinearModel.fit(A{1,i},Y);
end

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the cyclist 2013-5-29

If the code I posted is giving completely empty results, I suggest you file a bug report.

An alternative to using LinearModel.fit is the regress() command.

Simon 2013-5-30

I might report it eventually but i found out that this particular function generate an object and apparently i'm not supposed to have many objects in a single matrix. I manage to gather the Rsquared using Varname.Rsquared.Adjusted so that only answers pop out in a (1,15) matrix. The only problem i have here is that i don't have the combination variable names anymore and that might cause problem... If i try with 50 variables i won't be able to understand the answer! Thank you!!

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