How to check the existence of a file and rename it.

i use matlab in this way: i import a photo (e.g. photo.tif), use an algorithm to edit it and then export the edited in another folder and name it (e.g. photo_n.tif).

the problem is that i want to know if there is already the name of the new photo and then rename it (e.g. photo_n1.tif)

how can i do this without writing a code like "check the existence of photo_n.tif and if there is already one name it photo_n1"

is there a way...?

Answer 1

[Image Analyst]

Try this - it's fairly robust:

numberSuffix = 1;
baseFileName = 'photo_n';
fullFileName = fullfile(folder, baseFileName, '.tif');
while numberSuffix < 500 % Exit at 500 as a failsafe, just in case all files exist.
  if exist(fullFileName, 'file')
    % Construct a new filename.
    baseFileName = sprintf('photo_n%d.tif', numberSuffix);
    fullFileName = fullfile(folder, baseFileName, '.tif');
    % Prepare for next time, in case this name also existed.
    numberSuffix  = numberSuffix  + 1;
  else
    break; % Out of while loop
  end
end

Answer 2

[Azzi Abdelmalek]

   s=dir ('yourfolder/yourfilname');
   file=s.name
   !rename file new_filename

check the existing file by

   exist('yourfolder/yourfilname')