load files from different folders in current folder

Question

Anna Sergeeva 2019-10-31

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/488615-load-files-from-different-folders-in-current-folder

评论： Walter Roberson 2022-1-10

Hello

I have 3 different folders in the current folder (CBC, MHA, FJR). Each folder contains 12 mat files which have the same names in all folders. I have some code, that load and make some data processing on 12 files from one folder. Now I want to make a for loop that perform data processing in all three folders. I would like something like open the folder, make data processing and go back to current folder, then open another folder and so on. How can I do that?

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Answer 1

Walter Roberson 2019-10-31

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/488615-load-files-from-different-folders-in-current-folder#answer_399228

在 MATLAB Online 中打开

projectdir = '.';   %or name of containing folder
foldinfo = dinfo(projectdir);
foldinfo(~[foldinfo.isfolder]) = [];  %get rid of non-folders
foldinfo(ismember({foldinfo.name}, {'.', '..'})) = [];  %get rid of . and .. folders
foldnames = fullfile(projectdir, {foldinfo.name});
numfold = length(foldnames);
for D = 1 : numfold
    thisfold = foldnames{D};
    dinfo = dir( fullfile(thisfold, '*.mat'));
    filenames = fullfile(thisfold, {dinfo.name});
    numfile = length(filenames);
    for F = 1 : numfile
        thisfile = filenames{F};
        file_struct = load(thisfile);
        %now extract variables from file_struct and process them
    end
end

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Zakia wani 2022-1-10

can u plz mention where to edit this code to use it

Walter Roberson 2022-1-10

在 MATLAB Online 中打开

@Zakia wani

Edit the line

projectdir = '.'; %or name of containing folder

to reflect the name of the parent directory that contains the subfolders.

Edit the line

dinfo = dir( fullfile(thisfold, '*.mat'));

to change .mat to the appropriate extension for the files you are using.

Edit the line

file_struct = load(thisfile);

to use whatever function is needed to read in those kinds of files. For example, perhaps readtable() or dicomread(), depending on what is stored in the file.

Edit the line

%now extract variables from file_struct and process them

to be whatever code you need in order to process the file that you just read in.

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