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

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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!

Accepted Answer

Walter Roberson
Walter Roberson on 24 Feb 2021
Edited: Walter Roberson on 24 Feb 2021
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}, {});
numfiles = length(filenames);
for K = 1 : numfiles
thisfile = filenames{K};
do something with thisfile
Iugo on 24 Feb 2021
I think it worked :)
Because the calculations are kinda big I don't know yet but if I have any doubts I'll let you know @Walter Roberson!!
Once again, thank you so much!

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