sprintf extra space character!
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Experts, I am trying to rename some images with the following code. The new names should be '1.jpg', '2.jpg' etc. However, I get ' 1.jpg', ' 2.jpg' etc. Note there is a space before each digit. What is the issue with my code?
a ='C:\Users\Faraz\Desktop\IBHS\Flame height\Frames\';
A =dir( fullfile(a, '*.jpg') );
fileNames = { A.name };
for iFile = 1 : numel( A )
newName = fullfile(a, sprintf( '%2d.jpg', iFile ) );
movefile( fullfile(a, fileNames{ iFile }), newName );
end
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Walter Roberson
2018-4-10
0 个投票
%2d means that it should always take a minimum of 2 characters for the number. %d would use the minimum length for each number.
If you were looking for 01.jpg, 02.jpg, ... 09.jpg, 10.jpg, etc., then you would use %02d
5 个评论
Tala Hed
2018-4-10
Walter Roberson
2018-4-10
You tried to move (for example) 2.jpg to 2.jpg
You have the general problem that you might have input files that sort before digits but also have files names with digits that you do not want to clobber. It is not robust to move without verifying the output names first. I suggest creating a temporary directory first and moving them to there in order, and then move back from the temporary directory. (There are other algorithms possible.)
Tala Hed
2018-4-10
Walter Roberson
2018-4-10
a ='C:\Users\Faraz\Desktop\IBHS\Flame height\Frames\';
A = dir( fullfile(a, '*.jpg') );
fileNames = fullfile(a, {A.name} );
for iFile = 1 : length(fileNames)
oldName = fileNames{iFile};
newName = fullfile(a, sprintf( '%d.jpg', iFile ) );
if ~strcmp(oldName, newName)
movefile( oldName, newName );
end
end
Tala Hed
2018-4-10
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