create filedatastore of mat files filtering files by filename pattern

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kira 2019-5-14

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https://ww2.mathworks.cn/matlabcentral/answers/462044-create-filedatastore-of-mat-files-filtering-files-by-filename-pattern

Is it possible to create a filedatastore of mat files filtering files by filename pattern?

So far I got this:

fds = fileDatastore(dir_save,'ReadFcn',@load,'FileExtensions','.mat','IncludeSubfolders',true);
f=1;
while hasdata(fds)
    	disp(num2str(progress(fds)*100)	
        dataarray = read(fds);
        if ~isempty(strfind(fds.Files{f},myPattern))
            %% do somthing
   	end
   	f=f+1;
end

But some mat files I will not be using are really large and therefore slow down the process.

I cannot move all the files to 1 directirory because my directory structure is like:

d01/file1.mat
d01/myPatternFile.mat
d01/othefile.mat
d02/file1.mat
d02/myPatternFile.mat
d02/othefile.mat
etc

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