Save a matrix .mat in a specific folder with a variable name

Question

Emilio Pulli 2022-1-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1622115-save-a-matrix-mat-in-a-specific-folder-with-a-variable-name

编辑： Yongjian Feng 2022-1-4

I would like to save a matrix as a .mat file in a specific folder. The save function is located at the end of a for loop and, therefore, it is needed to be saved with a variable name changing each loop iteration. At the moment I am able to save the .mat file in a specific folder but I am not able to save it with the desired variable name. I am now using this function:

save('filepath','variablename')

where the variablename is the name of the .mat file that needs to be saved.

Thank you all!

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Answer 1

Yongjian Feng 2022-1-4

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https://ww2.mathworks.cn/matlabcentral/answers/1622115-save-a-matrix-mat-in-a-specific-folder-with-a-variable-name#answer_867715

编辑：Yongjian Feng 2022-1-4

在 MATLAB Online 中打开

Try something this:

a = 100;
for i=1:3
    file_name = ['filename' num2str(i)];
    save(file_name, 'a');
end

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Emilio Pulli 2022-1-4

Your method works but it does not include a way to save the variable in a desired folder

Yongjian Feng 2022-1-4

编辑：Yongjian Feng 2022-1-4

在 MATLAB Online 中打开

If you want to use the same folder but different file names:

a = 100;
folder_name = 'tmp';
if ~exist(folder_name, 'dir')
    mkdir(folder_name);
end
for i=1:3
    file_name = ['filename' num2str(i)];
    filepath = fullfile(folder_name, file_name);
    save(filepath, 'a');
end

Or if you want to use different folders:

a = 100;
for i=1:3
    folder_name = ['folder' num2str(i)];
    if ~exist(folder_name, 'dir')
        mkdir(folder_name);
    end
    filepath = fullfile(folder_name, 'filename');
    save(filepath, 'a');
end

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Answer 2

dpb 2022-1-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1622115-save-a-matrix-mat-in-a-specific-folder-with-a-variable-name#answer_867710

在 MATLAB Online 中打开

save(filepath,'variablename')

The functional form of save needs the file name to be the variable containing the (hopefully fully-qualified) desired filename, the variable name must be the literal string matching the variable to be saved.

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Emilio Pulli 2022-1-4

编辑：Emilio Pulli 2022-1-4

I need a way to both save the variable in a specific folder with a desired name. If you point me a way of how correctly placing these infos into the brackets of the save function I could figure the problem out

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