How to name my files differently in a loop

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

Answer 1

[Image Analyst]

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

[Researcher]

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]

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