Re: Fw: Derivate

[Ben Sapp]

Hi Oscar, 

You can do this with the development version of Octave if you have 
GiNaC(www.ginac.de) installed and then you get the 
octave-forge(octave.sourceforge.net) package and install it.  It will detect 
GiNaC and install the symbolic toolbox.    To take the derivative of the 
sin(x) would look like this:

address@hidden ben]$ octave
GNU Octave, version 2.1.35 (i686-pc-linux-gnu).
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 John W. Eaton.
This is free software with ABSOLUTELY NO WARRANTY.
For details, type `warranty'.

*** This is a development version of Octave.  Development releases
*** are provided for people who want to help test, debug, and improve
*** Octave.
***
*** If you want a stable, well-tested version of Octave, you should be
*** using one of the stable releases (when this development release
*** was made, the latest stable version was 2.0.16).

octave:1> symbols
octave:2> x = sym("x")
x =

x
octave:3> a = Sin(x)
a =

sin(x)
octave:4> differentiate(a,x)
ans =

cos(x)
octave:5>


Good luck and I hope this helps. 

Ben.  

On Thursday 11 April 2002 10:50 pm, Oscar Vasquez wrote:
> ----- Original Message -----
> From: Oscar Vasquez
> To: address@hidden
> Sent: Thursday, April 11, 2002 10:45 PM
> Subject: Derivate
>
>
> Hello:
>         I just want to know if exist a funtion to deriv an expresion, for
> example: I do:
> f = "sin(x);"
> exist something like d(f)/dx???
>
> Help me please...

-- 
Ben Sapp                         Los Alamos National Laboratory
email: <mailto:address@hidden>   Phone: (505)667-3277
Fax:   (505)665-7920             URL:   http://www.neutrino.lanl.gov/
--



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------