I’ve a little problem with *.m files in Ubuntu 9.10. I’ve installed Mathematica 7 and now extensions *.nb, *.nbp and *.m are opened with Mathematica, because they are “Mathematica Notebook” type. I want to open *.m to with gedit (I don’t use matlab, I use octave), however if I change the properties in nautilus then all “Mathematica Notebook” extensions are changed and the *.nb files are now opened with gedit instead of Mathematica.

Can you help me? I want to open the *.nb with Mathematica and *.m with gedit, how can I break the link between *.nb and *.m files?

Sorry for my English, I’m Spanish.

now i just deleted the whole files “mimeapps.list” and “mathematica”,then “open with other application”,simply put “mathematica”,because on my machine, “mathematica” is in one of my $PATH as the default.also worked.

in fact,what i really desire is to let all .nb file have a spikey icon but not the seemingly text ico, it seems that in my ubuntu8.10 OS, all.nb files are previewed exactly the same with the .doc ,.chm files.
can i expect them to behave the same as they do in windows OS ?

thank you for taking time for my concern.

Sorry – I assumed that your terminal would open inside your home directory so the cd command I posted is relative to that. On my machine my home directory is /home/mike so the full path to mimeapps.list is

/home/mike/.local/share/applications/mimeapps.list

of course yours will be relative to your home directory (also note that the correct directory is .local NOT local)

Let me know if that helps.

As for mathematica – it should just work if you simply put the full path to mathematica in the ‘open with’ box. For example on my machine I simply put

/usr/local/bin/mathematica

The “edit %f” applies ONLY to MATLAB and not to any other application.
Hope this helps

Wayne coming again,

i did curiously as you told to associate .nb files with Mathematica , but Mathematica started with a “why the beep?” messagebox, and the result is an empty notebook , .
the error message is
“Mathematica was unable to open the file edit’/home/tod/PursuitCurves-source.nb’.You may have a problem with your disk,or if you are using a fileserver,someone else may be using the file.Error code=-43.”

where problem lies?

and by the way ,i couldnt find mimeapps.list in /usr/local/share/applications/ to get rid of the invalid
userapp** texts.
did i missed something? thank you , hope My second language had made myself understood

The reason you had to put in /opt/matlab/bin/matlab rather than just matlab is because you don’t have matlab included in your path for some resason.

To remove the old entries try the following:

Open a terminal and type

cd .local/share/applications/
ls

From the ‘ls’ command you should see several files that look something like userapp-matlab-HL7NKU.desktop although the exact name may vary. Delete all of the userapp-matlab* files

Now open a file called mimeapps.list using gedit:

gedit ./mimeapps.list

Delete the line that starts ‘text/x-matlab=’, save the file and close gedit.

This procedure will remove all associations with MATLAB so you will need to redo the steps I talked about in my original post.

how do I remove the old “matlab” entries from the “open with” menu? These are attempts that didn’t work but the link is still there. Now I have 4 entries in the “open with” called “matlab” but only one of them works.

I was the person with the original question on the Matlab users forum.

The above solution works just great.

However, I had to change
matlab
to
/opt/matlab/bin/matlab
which is where my executable was located/

Now if I can only understand all the bits and pieces of the command!