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

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Ana Bianco on 9 Sep 2019
Commented: Ana Bianco on 9 Sep 2019
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

Fabio Freschi on 9 Sep 2019
% 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.

#### 1 Comment

Ana Bianco on 9 Sep 2019
That worked perfectly well, thanks Fabio!

Johannes Fischer on 9 Sep 2019
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

#### 1 Comment

Ana Bianco on 9 Sep 2019
Amazing!, thanks for the help!