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How to list files with multiple extensions?

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Kevin
Kevin 2012-10-24
编辑： Cris LaPierre 2024-1-9
Suppose I want mp3 or avi files from a folder, on Unix I could do
ls *.{mp3|avi}
Is there a clean one-liner way to do this in matlab? Presently, I can do it in two lines by doing the following:
f = dir(folder)
f(~cellfun(@isempty,regexpi({f.name},'.*(mp3|avi)'))).name
However, I find this rather ugly compared to the simplicity of the first expression.
Thanks, Kevin
  1 个评论
Matt J
Matt J 2012-10-24
编辑：Matt J 2012-10-24
If you find it ugly, why not just wrap it in an mfile of your own?

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回答（3 个）

Doug Hull
Doug Hull 2012-10-24
Can you run the command twice with two filters? The results would be two structures of the same format that could then be appended together.
  2 个评论
Kevin
Kevin 2012-10-24
Specifically, do you mean something like this?
f = [dir(fullfile(folder,'*mp3')); dir(fullfile(folder,'*avi'))];
I considered this, and it can certainly do for my present situation. However, it doesn't scale as well to more than a couple of extensions (at least the way I presented it) as the cellfun thing I put previously.
Thanks for the suggestion, though!
Sean de Wolski
Sean de Wolski 2012-10-24
@Kevin, a for-loop over a cell array containing the extentions would allow it to scale, though concatenating structures is ugly.

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Sean de Wolski
Sean de Wolski 2012-10-24
You could just farm that command out to Unix if you are on a unix system...
  1 个评论
Kevin
Kevin 2012-10-24
You mean, something like:
[~, sysout] = system(['ls ' fullfile(folder,'*{mp3,avi}')]);
fileNames = regexp(sysout,'\n','split');
While this would work, cross comparability with windows is a must for me. Thanks for your input, though!

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ANKUR WADHWA
ANKUR WADHWA 2019-11-6
编辑：Cris LaPierre 2024-1-9
Though the thread is very old still for users who are looking for an easy way a very simple existing solution on Matlbcentral
https://in.mathworks.com/matlabcentral/answers/16173-dir-search-multiple-files

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