How to rename images from a series of folder

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.

Answer 1

[Marta Salas]

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

[Md]

Thank you so much. It works!

[Le Dung]

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]

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'