How to assign a different name of a matrix for each iteration?

Question

Ana Bianco 2019-9-9

0
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评论： Ana Bianco 2019-9-9

Hi everyone,

I am trying to, for each iteration (that goes from 1 to 270), assign a different name for the result matrix of the function modalfit from Matlab Signal Processing Toolbox.

The matrix is a 1x10 for each iteration.

For example, I want for j=1 that the matrix is called [fn1] and saved in the workspace...

This is the code:

for j = 1 : size(varargout,2)

[fn]= modalfit(varargout{1,j}, f, fs, 10, 'FreqRange', [0 3000], 'FitMethod' , 'PP');

end

I would be very happy to be helped.

Thanks, Ana

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Answer 1

Fabio Freschi 2019-9-9

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Don't use this sintax (for details, see https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval). You can use a cell array

% preallocation
fn = cell(size(varargout,2),1);
for j = 1 : size(varargout,2)
 fn{j} = modalfit(varargout{1,j}, f, fs, 10, 'FreqRange', [0 3000], 'FitMethod' , 'PP');
end

and you can get the desired matrix as fn{1}, fn{2}, etc.

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Ana Bianco 2019-9-9

That worked perfectly well, thanks Fabio!

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Answer 2

Johannes Fischer 2019-9-9

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You could use assignin for that purpose:

for j = 1 : size(varargout,2)
 fn = modalfit(varargout{1,j}, f, fs, 10, 'FreqRange', [0 3000], 'FitMethod' , 'PP');
 assignin('base', ['fn' num2str(i)], fn)
end

but what speaks against storing it all in one 270x10 matrix?

fn = zeros(size(varargout,2), 10)
for j = 1 : size(varargout,2)
 fn(j, :) = modalfit(varargout{1,j}, f, fs, 10, 'FreqRange', [0 3000], 'FitMethod' , 'PP');
end