How to name my files differently in a loop

Question

Asser Abdelgawad 2022-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/1735885-how-to-name-my-files-differently-in-a-loop

评论： Image Analyst 2022-6-7

I want each "pic" to have a differnet name corresponding to n. i.e: 1.jpg, 2.jpg, etc.

This gives me an error because the n is not in quotations for a filename, but if I do this, then the images keep overwriting each other so that at the end I only have one image that is called "n". How do I avoid this?

for n = 1:68

pic(:,:,n) = Amp((n-1)*64+1:n*64,:);

pic(:,:,n) = wdenoise(pic(:,:,n));

pic(:,:,n) = uint8(pic(:,:,n));

imwrite(pic(:,:,n), colormap(), n,'jpg');

end

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Answer 1

Image Analyst 2022-6-7

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1735885-how-to-name-my-files-differently-in-a-loop#answer_980925

编辑：Image Analyst 2022-6-7

在 MATLAB Online 中打开

Try this

for n = 1:68
    pic(:,:,n) = Amp((n-1)*64+1:n*64,:);
    pic(:,:,n) = wdenoise(pic(:,:,n));
    pic(:,:,n) = uint8(pic(:,:,n));
    baseFileName = sprintf('%2.2d.png', n);
    fullFileName = fullfile(pwd, baseFileName);    
    fprintf('Writing %d of 68 : "%s."\n', n, fullFileName);
    imwrite(pic(:,:,n), fullFileName);
end

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Asser Abdelgawad 2022-6-7

Thank you! Also, is there a way to change where the files are saved? imwrite automatically saves them to the same folder my .m file is in but I would like to save it elsewhere.

Image Analyst 2022-6-7

在 MATLAB Online 中打开

Just assign some folder where you'd like to save them

folder = 'c:\whatever'
if ~isfolder(folder);
    mkdir(folder);
end
for n = 1:68
    pic(:,:,n) = Amp((n-1)*64+1:n*64,:);
    pic(:,:,n) = wdenoise(pic(:,:,n));
    pic(:,:,n) = uint8(pic(:,:,n));
    baseFileName = sprintf('%2.2d.png', n);
    fullFileName = fullfile(folder, baseFileName);    
    fprintf('Writing %d of 68 : "%s."\n', n, fullFileName);
    imwrite(pic(:,:,n), fullFileName);
end