Saving a preallocated matrix within a nested for loop

Code is below. I am trying to save the SpectroBey matrix before the nested loop to correspond with the files that are being pulled in within the first loop. So in the end, I would like to have saved SpectroBey1, SpectroBey2, Spectrobey3....and so on.

for j=1:6

     SpectroBey=[];

         for jj=1:length(tslide)
             g=exp(-width*(t-tslide(jj)).^2);
             Pg=g.*P; Pgf=fft(Pg);
             SpectroBey=[SpectroBey;abs(fftshift(Pgf))];
         end

     [m,n]=size(SpectroBey);
     SpectroBey=reshape(SpectroBey,m*n,1);

     save(sprintf('SpectroBey%d', j), 'SpectroBey')
 end

Answer 1

[Jan]

Your code does explicitly not use a pre-allocation. Therefore the tag and the title is misleading. The code contains a lot of details, which do not concern the question. It is more convenient for the readers if you concentrate on the problem.

As far as I understand your message (what exactly is your question?). all you need is this line:

save(sprintf('SpectroBey%d', j), 'SpectroBey')

You find further details if you read the FAQ section: How to process files in a loop. Ask your favorite search engine for "Matlab FAQ" or search in this forum.

[jpers]

Thank you for your response. I apologize I thought the line before the nested loop, SpectroBey=[], was pre-allocating. So specifically, I would also like for the SpectroBey matrix to be named for each iteration of the first loop.