Exist returning zero when file definitely exists; rehash not working

I have written a script to help organize my files, the main point of which is to group all graphics of a certain type into one folder (which is made in the execution of the script), and same with other graphics.

Unfortunately I have many folders to do this in, and they are not uniformly filled with the same file types. So I am trying to find out if certain graphics exist, but I get a negative answer if I use a wildcard, where specific file names get a positive:

>> exist([Directory,'01-Oct-2009_1.jpeg'])

ans =

       2

>> exist([Directory,'*.jpeg'])

ans =

       0

I've tried using rehash and rehash path and neither works. Any idea how I can fix this?

Answer 1

[Jian Wei]

To find out if there is any JPEG file in the Directory folder, you can use the wildcard character as follows.

isempty(dir([Directory,'*.jpeg']));

Answer 2

[Ahmet Cecen]

I am not sure why the wildcar doesn't work. How about using the wildcard with dir beforehand and searching within the matlab matrix?

files = dir('*.jpeg');

This should get you and extensive list of every jpeg in the folder.