ordering a listbox by extension

Is it possible to load two types of files into a list box BUT order not by filename but with the same extensions.

I use this, but it appears to order by date. I would like to group the two sets of files together so If I am only loading *.jpg and *.xls, I need all the jpgs ordered first, and then all the xls.

for Index = 1:length(ImageFiles)
    baseFileName = ImageFiles(Index).name;
    [folder1, name, extension] = fileparts(baseFileName);
        extension = upper(extension);
    ListOfImageNames = [ListOfImageNames baseFileName];
end

   set(handles.listbox1, 'string', ListOfImageNames);

Answer 1

[Joseph Cheng]

two ways to accomplish this, stack the extensions as well and use sort/sortrows to order the extensions. with the sorting functions you can get the reordering index and apply that to your list of files.

second method would be how you're creating your list of files. are you using dir()? if so you can use the wildcard filter in it to compile 2 lists.

 ImageFiles=dir('yourFolder\*.jpg'); %to get the list of jpegs
 XLSfiles=dir('yourfolder\*.xls'); %to get the list of xls files

 set(handles.listbox1,'string',[ImageFiles;XLSfiles]);

[Jason]

Thanks for the suggestion. Its not always the same type of files, so although I like the 2nd idea of stacking the images, its not really practical. So is my only option to use sort and figure out how to sort with an extension? Thanks