MATLAB: How to increase Memory

out of memory

Dear friends

I used a "for" loop in my M.file codes and I used "fopen" and "fclose" functions in "for" loop.

After 508 iterations, MATLAB has been stopped and following message showed:

"??? Error using ==> fprintf
Invalid file identifier.  Use fopen to generate a valid file identifier."

I think, MATLAB faced Low memory problem because by closing software and starting again MATLAB can continue to remain iterations. Therfore I need to a function to increase MATLAB memory. The "clear all" is not useful.

Regards

Best Answer

You aren't using the same filename are you? So that it might be a timing issue. Try adding a pause(0.1). Another shot in the dark: try fclose('all').

Related Solutions

MATLAB: How can ı solve this error ? Error using fprintf Invalid file identifier. Use fopen to generate a valid file identifier.

Check the success of fopen in every case, under all circumstances, ever, nerver omit this test:

filename = 'myfile.txt';
filepath = cd;
file     = fullfile(filepath, filename);
fid = fopen(file, 'wt');
if fid==-1
  error('Cannot open file for writing: %s', file);
end

I guess you do not have privileges to write to the current folder.

MATLAB: Too many files open error yet I am closing files

"...you will see that after I complete reading each file I close the file using fclose(fID)."

Nope. You actually only close the very last file, the one that was opened on the last loop iteration:

for file = ...
    fID = fopen(...);
    ...
end
fclose(fID)

If you want to close each file that you opened then you will need to move the fclose inside the loop:

for file = ...
    fID = fopen(...);
    ...
    fclose(fID)
end

Best Answer

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MATLAB: How can ı solve this error ? Error using fprintf Invalid file identifier. Use fopen to generate a valid file identifier.

MATLAB: Too many files open error yet I am closing files

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