How to retrieve file extensions from UIPUTFILE

[lehmannkai]

Hi,

I use UIPUTFILE to query for a path % file. Also 4 different file extensions are given in the query figure (*.eps, *.bmp, *.tif, *.jpg).

How can I retrieve the file extension selected by the user?

The user selects *.jpg for example. The entered filename is "test" only. How can I know that the user wants a jpg file to be saved if the only outputs are path and filename but not file extension?

Regards,
Kai

 

[JockeK]

UIPUTFILE's third output argument is what your looking for.

Try this

[filename, pathname, filterindex] = uiputfile( ...
{'*.m;*.fig;*.mat;*.mdl','MATLAB Files (*.m,*.fig,*.mat,*.mdl)';
 '*.m', 'M-files (*.m)'; ...
 '*.fig','Figures (*.fig)'; ...
 '*.mat','MAT-files (*.mat)'; ...
 '*.mdl','Models (*.mdl)'; ...
 '*.*',  'All Files (*.*)'}, ...
 'Save as');

 

[lehmannkai]

Hi JockeK,

thanks for your advise. Bit the thirs argument 'filetrindex' applies for Matlab Versions from 6.5 only doesn't it? I only have Version 6.2 available. What can I do?

Regards,
Kai

 

[JockeK]

This is another solution

[filename, pathname] = uiputfile( .... );
[file, extension] = strtok(filename, '.');

 

[lehmannkai]

Hi,

but that leads me off the actual problem. I worry about the case that the given filename is entered without extension. However, a filter eg. ".mat" was specified. I could attach the ".mat" in my function but how can I know that the user specified "*.mat" ????

There doesn't seem to be a way out...

Kai

 

[JockeK]

Isn't the chosen filter added automatically to the filename? Oh, now I see that it's not added if the user doesn't choose a filter.
I that case you can assume that it's the first extension in the list you should append to the filename.

I believe you could solve the problem by doing something like this...

1. Check the extension with the strtok-function as described above.
2a. If there is no extension you just add the first extension in the list you specified in your call to uiputfile.
2b. If an extension exists you don't have to do anything.