Re: Octave-symbolic package

[Wolfgang Lindner]

hi Ben,

why not use the GNU CAS Maxima 5.17 in a window parallel with octave?
Or try SAGE - but that's big ..

HTH
Wolfgang

-----Ursprüngliche Nachricht-----
Von: Benjamin Brown <address@hidden>
An: address@hidden <address@hidden>
Datum: Samstag, 21. März 2009 20:30
Betreff: Octave-symbolic package


>Hello,
>
>I come from a Matlab background, but I've been trying to migrate to octave.
>The most important thing that I've been missing is the symbolic toolbox.
>Then I found octave-symbolic.  The only issue I'm having is that the usage
>seems to be a bit different from the Matlab toolbox.  I've defined a number
>of symbols, z, z_p, b, and a using:
>
>z=sym("z")
>z_p=sym("z_p")...
>
>
>without error.  Then when I try to create an expression:
>
> k=e^(i*b(sqrt((z-z_p)^2+a^2)))/(4*pi*sqrt((z-z_p)^2+a^2))
>
>I get the following errors:
>
>error: mapper: wrong type argument `ex'
>error: evaluating argument list element number 1
>error: evaluating binary operator `*' near line 11, column 7
>error: evaluating binary operator `^' near line 11, column 4
>error: evaluating binary operator `/' near line 11, column 31
>error: evaluating assignment expression near line 11, column 2
>
>
>Is there any way you could send me some basic usage sample code for this
>package.  Any help would be appreciated.
>
>-Benjamin Brown
>