l i n u x - u s e r s - g r o u p - o f - d a v i s
L U G O D
 
Next Meeting:
July 21: Defensive computing: Information security for individuals
Next Installfest:
TBD
Latest News:
Jul. 4: July, August and September: Security, Photography and Programming for Kids
Page last updated:
2004 Jul 14 21:38

The following is an archive of a post made to our 'vox mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox] Graphy on octave or Maxima
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox] Graphy on octave or Maxima



On Wed, 14 Jul 2004, Ken Bloom wrote:

> On Wed, Jul 14, 2004 at 10:36:09AM -0700, Chris Horsting wrote:
> > Ken Bloom wrote:
> > > On 2004.07.13 23:12, Chris Horsting wrote:
> > > > Ken Bloom wrote:
> > > > > On 2004.07.13 16:08, Chris Horsting wrote:
> > > > > > Does any one know how to graph polynomial on either octave
> > > > > > or maxima.  There is instruction on graphing trig function
> > > > > > but not polynomials Thanks Chris
> > > > >
> > > > > octave:7> x=-2:.1:2; octave:8> plot(x,x.^2)
> > > > >
> > > > > remember to use operators like .^, .+, .* where you're working
> > > > > with the x matrix, because those do cell-by-cell operations,
> > > > > whereas ^ + and * do matrix operations. (Although it's
> > > > > perfectly OK to write a polynomial as 3*x.^2+3*x+x because +
> > > > > and .+ will be the same, and * is the same as .* when you're
> > > > > multiplying a scalar)
> > > > >
> > > > Hi Ken, I typied the two lines and it did not work. Is there
> > > > another way of defining x?  Thanks Chris
> > > 
> > > Can you show me output and error messages then?
> > > 
> > error: for A^b, A must be square
> > error: evaluating binary operator '^' near line 2, column 9
> > error: evaluating argument list element number 2
> > error: evaluating index expression near line 2, column 1
> 
> You need to use the .^ operator, as I explained above.

Also, look up the POLYVAL function in the documentation.

---------------------------------------------------------------------------
Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil@dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
                                      Live:   OO#.. Dead: OO#..  Playing
Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
/Software/Embedded Controllers)               .OO#.       .OO#.  rocks...2k
---------------------------------------------------------------------------

_______________________________________________
vox mailing list
vox@lists.lugod.org
http://lists.lugod.org/mailman/listinfo/vox



LinkedIn
LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
facebook
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
EDGE Tech Corp.
For donating some give-aways for our meetings.