How to rename images from a series of folder

Question

Md 2014-3-28

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/123462-how-to-rename-images-from-a-series-of-folder

评论： Walter Roberson 2018-12-24

Hi All, I worte a code to rename the images in the folders. This is my code.

 mainDirectory = 'C:\Users\md\Desktop\NewFolder';
 subDirectory = dir([mainDirectory '/N*']);
 for m = 1 : length(subDirectory)
a=char('mainDirectory '\' subDirectory(m))');
subFolder = dir(a,'\*.tif');
fileNames = {subFolder.name};
 for iFile = 1 : numel( subFolder )
   newName = fullfile(subDirectory, sprintf( 'D_1_20%2d.tif',(14-iFile) ) ); 
movefile( fullfile(subDirectory, fileNames{ iFile }), newName );    
 end 
end

when I run the code, it is saying that too many input arguments. I don't know what I am doing wrong. also there is an error in this line

subFolder = dir(a,'\*.tif');

Thanks in advance.

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Answer 1

Marta Salas 2014-3-28

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https://ww2.mathworks.cn/matlabcentral/answers/123462-how-to-rename-images-from-a-series-of-folder#answer_130825

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mainDirectory = 'C:\Users\md\Desktop\NewFolder';
subDirectory = dir([mainDirectory '/N*']);
for m = 1 : length(subDirectory)
subFolder = dir(fullfile(mainDirectory, subDirectory(m).name,'*.tif'));
fileNames = {subFolder.name};
   for iFile = 1 : numel( subFolder )
     newName = fullfile(mainDirectory, subDirectory(m).name, sprintf( 'D_1_20%2d.tif',(14-iFile) ) ); 
     movefile( fullfile(mainDirectory, subDirectory(m).name, fileNames{ iFile }), newName );    
   end 
  end

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Le Dung 2018-12-24

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Dear Marta Salas.

what is the meaning of '/N*' in the command line:

subDirectory = dir([mainDirectory '/N*']);

When i use the cmmand line, matlab return:

0 x 1 struc with 5 fields

but, when i dont use '/N*', matlab return:

11x1 struc with 5 fields

Is '/N*' for folders and not take into account is for files?

Could you explain to me ?

Walter Roberson 2018-12-24

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The original poster in 2014, md, happened to be interested in only the subfolders whose names began with the letter N. It is not some kind of special command switch: it is just part of the name.

Another way that it could have been coded would be

subDirectory = dir( fullfile(mainDirectory, 'N*') );

You might have been misled by the fact that a / was used when you expected to see \ for directory names. It turns out that internally, MS DOS has always used / as the directory separator, but that way way back for compatibility with CP/M command line structure that used / as the way to indicate command options, the shell used \ to indicate directory boundaries. But that was only for presentation purposes, and internally it uses / . Therefore in MS Windows, 'C:\Users\md\Desktop\NewFolder' is the same as 'C:/Users/md/Desktop/NewFolder'

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