Problem with making a new directory

Question

Sam 2014-12-29

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/168411-problem-with-making-a-new-directory

评论： Sam 2014-12-29

I created a code to save figures for each test for 5 subjects. It gives a warning that the subfolder already exists. So I tried to use if statements, and for the directory 'Data_examen1' it worked. But if I include making the subfolder also in my if-statement. It gives an error. I understand what's going wrong here... But I can't figure out how to get rid of the warning...

 for welke_pp=1:5 % for 5 subjects
...
for i_testen=1:5 % for 5 measurements
...
if ((i_testen == 1) && (welke_pp == 1))
mkdir Data_examen1 %make new directory
end
mkdir('Data_examen1', sprintf('pp%d', welke_pp)); %hmake a new subfolder. Here is the warning.
folder = 'Data_examen1';
subfolder = sprintf('pp%d',welke_pp);
pngFileName = sprintf('3Dplot_subject%d_trial%d.png', welke_pp, i_testen);
fullFileName = fullfile([folder '\\' subfolder], pngFileName);
saveas(gcf,fullFileName); %save each figure

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Answer 1

Image Analyst 2014-12-29

2
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https://ww2.mathworks.cn/matlabcentral/answers/168411-problem-with-making-a-new-directory#answer_163545

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Just wrap your mkdir() in an if statement

if ~exist(folderName, 'dir')
    % Folder does not exist so create it.
    mkdir(foldername);
end

If it exists already, it won't do this and therefore won't throw an error.

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Image Analyst 2014-12-29

在 MATLAB Online 中打开

It should if you specify the full path of the folder.

subFolder = sprintf('pp%d', welke_pp);
fullPath = fullfile(someRootFolder, subFolder);
if ~exist(fullPath , 'dir')
    % Folder does not exist so create it.
    mkdir(fullPath );
end

Your code probably actually did create the folder but in a location you were not expecting and did not look for or in. Do it my way and look at the fullPath value and see if it makes sense. Then use the debugger to see if it actually enters the "if" block.

Sam 2014-12-29