How to save one variable from one .mat file to another .mat file

There are many.mat file (1.mat; 2.mat; 3.mat...), all these files have many variables, however, all these file contains one variable name 'data' (different values in different file). I hope to change the variable name ('data' ) into '1_data.mat, 2_data.mat, 3_data.mat... 'and save these files into another folder. I appreciate it if someone give me some advice. Thanks in advance.

Answer 1

[Ameer Hamza]

Something like this

files = dir('*.mat');
folder_path = 'C:\...'; % path to folder where you want to save the new files

for i = 1:numel(files)
    old_name = files(i).name;
    new_name = strrep(old_name, '.mat', '_data.mat');
    new_name = fullfile(folder_path, new_name);
    data = load(old_name);
    data = data.data;
    save(new_name, 'data');
end

[xiao wei]

thanks for your reply. the code run good , but there is no results on the folder where I want to save the new files. could you give me more advice on it? thank you

[Ameer Hamza]

Have you specified the complete path of the folder? Consider adding a breakpoint and run the code line by line to see where is the issue.

[xiao wei]

now, the code run well. thank you very much.

[Ameer Hamza]

I am glad to be of help!