Error: Cannot create output file

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fawkok
fawkok 2018-1-23
编辑： Jan 2018-1-23
In a matlab script printing multiple figures, I am trying to save as each figure as a .png image. I am doing so by using the print function. When testing the print function, I get the following:
>> print('newfile','-dpng')
Error using name (line 102)
Cannot create output file '.\newfile.png'.
Error in print (line 200) pj = name( pj );
Could anyone tell me how to fix this?
Thanks a lot.

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Jan
Jan 2018-1-23
The error message means, that the file "newfile.png" cannot be created in the current folder. Either this file is existing already, but write-protected or in use. Or you do not have write permissions in the current folder.
Prefer to define file names including the complete path, because you cannot control if a timer or GUI callback uses cd to change the current folder. Relying on the current folder to be, where it is expected, is not reliable.
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Walter Roberson
Walter Roberson 2018-1-23
Yes you can use num2str and concatenation, but it is usually better to use sprintf and fullfile()
Jan
Jan 2018-1-23
编辑：Jan 2018-1-23
for k = 1:10
file = fullfile(folder, sprintf('File%03d.jpg', k));
disp(file);
end
See also: https://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files

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