How to loop through all files present in several subfolders in a main folder?

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Iugo 2021-2-24

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https://ww2.mathworks.cn/matlabcentral/answers/755189-how-to-loop-through-all-files-present-in-several-subfolders-in-a-main-folder

评论： Iugo 2021-2-24

Hello!!

I have a main folder (with this directory D:\ABIDEdataset\Outputs\dparsf\nofilt_noglobal\rois_aal) and 16 subfolders (Caltech, KKI, Leuven, Stanford,etc..) in it, with each subfolder containing several *mat files within them. I want to create a loop that goes through all the files coming from all the subfolders and use each file for then perform some calculations.

Thanks in advance!

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Answer 1

Walter Roberson 2021-2-24

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https://ww2.mathworks.cn/matlabcentral/answers/755189-how-to-loop-through-all-files-present-in-several-subfolders-in-a-main-folder#answer_632334

编辑：Walter Roberson 2021-2-24

在 MATLAB Online 中打开

https://www.mathworks.com/help/matlab/ref/matlab.io.datastore.filedatastore.html

You can use a filedatastore with a reader function that loads the appropriate variables from the .mat files.

Or you can use dir with ** wildcard:

dinfo = dir('D:\ABIDEdataset\Outputs\dparsf\nofilt_noglobal\rois_aal\**\*.mat');
filenames = fullfile({dinfo.folder}, {dinfo.name});
numfiles = length(filenames);
for K = 1 : numfiles
    thisfile = filenames{K};
    do something with thisfile
end