How to save the variables inside for loop

Question

Jab 2016-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/265163-how-to-save-the-variables-inside-for-loop

评论： Michael O'Brien 2019-11-2

采纳的回答： jgg

I am executing loop for k=1,2,5,6,.......100 E=produces column vector of different size; end

I need to save 'E' for each value of k;

Thanks Any help is appreciated!

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Answer 1

jgg 2016-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/265163-how-to-save-the-variables-inside-for-loop#answer_207397

编辑：jgg 2016-1-25

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The easiest way to probably to just use a cell array.

 Es = cell(100,1)
 for i = 1:100 %your loop
   % do stuff; generate E
   Es{i} = E
 end

I'm assuming you already have the loop working, you're just trying to save the output. This will be stored in Es.

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jgg 2016-1-25

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It would probably be difficult; all your vectors are of different sizes, which means you can't just stack them into a big matrix. If you knew they had a max size M then you could do this:

 Es = NaN(100,M);
 for i = 1:100 %your loop
  %do stuff, generate E
  Es(1:length(E)) = E;
 end

This will store E in the first elements of Es for each row; the rest will be NaN values. The problem is that this is pretty inefficient in terms of memory, but it might work. You also need to know M which is difficult.

Michael O'Brien 2019-11-2