How do I grab all the files with a certain name pattern from several folders?

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George 2022-7-6

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回答： Stephen23 2022-7-6

Hi, I have text files with the same name format that I want to grab from several folders (also with the same name format) all at once (to then compile the text files into one file).

I read on another post that below is the format to grab it but I cannot get it to work:

filePattern = fullfile(myFolder, '**Folder/*')

(to display what I am looking for, I want to grab all of the files with "grab" in them)

All_files -> Folder1 -> no1

-> grab1

-> Folder2 -> no2

-> grab2

-> Folder3 -> no3

-> grab3

Thank you!

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dpb 2022-7-6

See the example dir "Find Files in Subfolders" that should work ok for your case that is pretty simple pattern.

I find it easier to often dispatch a dir command to the OS where can use the OS switches and more expanded wildcard matching than what the MATLAB dir() implements, particularly with the JPSoftware command replacement that is far more powerful than the MS-supplied tools if one is on Winders...

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Answer 1

Stephen23 2022-7-6

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https://ww2.mathworks.cn/matlabcentral/answers/1754695-how-do-i-grab-all-the-files-with-a-certain-name-pattern-from-several-folders#answer_1001600

在 MATLAB Online 中打开

All_files -> Folder1 -> no1
                     -> grab1
          -> Folder2 -> no2
                     -> grab2
          -> Folder3 -> no3
                     -> grab3

The double asterisk is a wild wildcard which recursively matches any folder names. It is clearly specified in the DIR documentation that "Characters next to a ** wildcard must be file separators", which your code does not do.

Here are two approaches:

P = 'absolute or relative path to All_Files';
S = dir(fullfile(P,'**','grab*')); % recursively match all subfolders
S = dir(fullfile(P,'Folder*','grab*')) % match subfolders named "Folder..."