How can i load .mat files from subfolders with for loop?

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Josef Bubendorfer 2019-12-2

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https://ww2.mathworks.cn/matlabcentral/answers/494325-how-can-i-load-mat-files-from-subfolders-with-for-loop

评论： Josef Bubendorfer 2019-12-5

I have a different number of .mat files in several folders, which I would like to import, plot data und save it in the same folder as a pdf file.

Here an example with two folders:

C:\Users\I2d1_4_1_1\

y3.mat

y4.mat

y5.mat

C:\Users\I5d1_4_1_1\

y3.mat

y4.mat

y5.mat

y6.mat

My two questions are:

How do i save it in the same folder without changing the directory.
How to adapt the code that i dont need to change the for loop i=3:5 for the first folder and i=3:6 for the second folder.

DataPath ='C:\Users\';
for i=3:60 
for input=[2 5 8]
for delay=[4 8 12];
for delayinput=[1 4 8];               
    load([DataPath 'I%dd1_%d_1_%d\y' num2str(i) '.mat',input,delay,delayinput])   
figure(1), plotregression(x, y); 
SaveName = sprintf('NN_%d_1_%d',i,delay);
saveas(figure(1),fullfile(DataPath 'I%dd1_%d_1_%d', SaveName),'pdf')
end
end
end
end

Thanks for your help.

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采纳的回答

Walter Roberson 2019-12-4

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https://ww2.mathworks.cn/matlabcentral/answers/494325-how-can-i-load-mat-files-from-subfolders-with-for-loop#answer_404596

在 MATLAB Online 中打开

projectdir = 'C:\Users';
foldinfo = dir( fullfile(projectdir, 'I*') );
foldinfo(~[foldinfo.isdir]) = [];   %get rid of I* that are not folders
foldnames = fullfile(projectdir, {foldinfo.name});
numfold = length(foldnames);
for didx = 1 : numfold
    thisfold = foldnames{didx};
    dinfo = dir(fullfile(thisfold, 'y*.mat'));
    filenames = fullfile(thisfold, {dinfo.name});
    numfiles = length(filenames);
    for fidx = 1 : numfiles
        thisfile = filenames{fidx};
        datastruct = load(thisfile);
        x = datastruct.x; y = datastruct.y;
        and do your thing
    end
end

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Walter Roberson 2019-12-5

在 MATLAB Online 中打开

[~, fold_name_only] = fileparts(thisfold);

It was a mistake on my part. Too many years of working with too many languages.

Josef Bubendorfer 2019-12-5

Now that is working but the line drawnow ratelimit gives an error as unknown command option.

I am really thankfull for your work.

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更多回答（1 个）

Akira Agata 2019-12-3

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/494325-how-can-i-load-mat-files-from-subfolders-with-for-loop#answer_404360

在 MATLAB Online 中打开

How about using dir function?

Using the function, the solution would be like this:

fileList = dir('C:\Users\**\*.mat');
for kk = 1:numel(fileList)
  filePath = fullfile(fileList(kk).folder,fileList(kk).name);
  load(filePath);
  h = figure;
  plotregression(x,y); 
  saveName = replace(fileList(kk).name,'.mat','.pdf');
  saveas(h,fullfile(fileList(kk).folder,saveName));
  close(h);
end

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Akira Agata 2019-12-3

在 MATLAB Online 中打开

Then, you should change the first line to:

fileList = dir('C:\Users\I2d1_4_1_1\*.mat');

and change the fileList(kk).folder to 'C:\Users\I2d1_4_1_1\'.

Then, please do the same thing to the other folder C:\Users\I5d1_4_1_1\.

Josef Bubendorfer 2019-12-4

OK, thanks. Thats what i more or less already do, but if there is no "automatical" way to do it I have to go on like this. But thanks for the help and your ideas.

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