DURY Bastien wrote
> Yes exactly ! That is very cool thank you very much I could not find
> anything on the web !
> I have another question for you...
> I a using a xlswrite function in my program to export a matrix in excel
> but it always tells me "error: 'r_extnd' undefined" when I want to run it.
> Do you know what I need to do ?
Sure, upgrade the io package.
In octave type;
pkg uninstall -nodeps io
pkg install -verbose -forge io