From Matlab to Octave

[D. Hartog]

Hi,

I am trying to switch from Matlab to Octave....

It is not total clear for me which packages I should install on Debian 
testing, I've octave 2.9 and 3.0 installed... Should I install all the 
octave- packages?

Do you use emacs as editor?

Where can I find useful information about switching from Matlab to 
Octave or do you have some advice for me?

Thanks in advance,

Dirk