which('folderName') - Find the Location of a subdirectory of a directory

Question

Matthew 2016-4-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/276657-which-foldername-find-the-location-of-a-subdirectory-of-a-directory

评论： Star Strider 2016-4-1

Is there a simple way (better than brute force) to treat subdirectories as files and find the subdirectory which is highest on the matlab path?

i.e. if there exists a folder c:\Documents And Settings\user\My Documents\Matlab\myFolderName

whichOverload('myFolderName','dir')
%Should return c:\Documents And Settings\user\My Documents\Matlab\myFolderName

Note that parsing the path does not solve this immediately. The brute force way to do this would be something like

P = regexp(path,'[^;]+','match');
allItems = cellfun(@(x) dir(x),P,'UniformOutput',false);
matches = cellfun(@(x) ismember('myFolderName',{x.name}),allItems);
highestMatch = fullfile(P{find(matches,1)},'myFolderName');

But this is ugly and slow. . .

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Answer 1

Star Strider 2016-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/276657-which-foldername-find-the-location-of-a-subdirectory-of-a-directory#answer_216018

Use the what function instead.

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Matthew 2016-4-1

Thank you! That is very simple, and is exactly what I was looking for. Guess I need to polish up more on my documentation search skills!

Star Strider 2016-4-1

My pleasure!

I remember using it a while back (after a long expedition through the documentation to find it). I had to look it up too just now because I forgot its name. I just knew it was there somewhere.

I’m still discovering new functions and new applications for them, and I’ve been using MATLAB since 1994. MATLAB is a large language, and the documentation reflects that.

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