save ensure automatic renaming

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Wouter Verstraelen
编辑： Stephen23 2019-6-7
I am running a script repeatedly each time changing a few parameters, each time evaluation takes at least a few hours. At the end of my code, I put
save('myfilename.mat').
Now, each time, I have to ensure I change myfilename to avoid any data gets overwritten. Is there a way to ensure that if 'myfilename.mat' already exists, matlab saves the second .mat file as 'myfilename(1).mat' etc?
  2 个评论
Stephen23
Stephen23 2019-6-7
编辑：Stephen23 2019-6-7
This is exactly what my FEX submission is intended for:
https://www.mathworks.com/matlabcentral/fileexchange/64108-next-available-filename
It is designed to work efficiently even when there are a large number of files, and does not rely on a particular loop or continual code evaluation.

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Walter Roberson
Walter Roberson 2019-6-7
There is no automatic way to do that. You can write your own code for the purpose.
filenum = 0;
while true
filenum = filenum + 1;
filename = sprintf('myfilename_%d.mat', filenum);
if ~exist(filename, 'file'); break; end
end
save(filename);
  1 个评论
Wouter Verstraelen
Wouter Verstraelen 2019-6-7
thanks! I'd believe it would be great if in the future there could just be some kind of flag to the save-command though.

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