Re: Phase Portrait
- To: mathgroup at smc.vnet.net
- Subject: [mg76243] Re: Phase Portrait
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 18 May 2007 06:17:05 -0400 (EDT)
- Organization: Uni Leipzig
- References: <f2hck0$2fc$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
and
ContourPlot[p^2/2 + Cos[x], {x, -Pi, Pi}, {p, -4, 4}]
draw the pahs portrait of a pendelum ? with a perfect
separatrix, in version 6.0 ??
And including 1.0 into the Contours option will do it in
version 5.2 also ??
Regards
Jens
herato wrote:
> Hi!
> I would like to plot a simple phase portrait of some standard equation
> such as the pendulum .
>
> How to do it?
>
> It is completely equivalent to plot sublevels of the Hamiltonian, but
> in this case Mathematica does not plot the separatrix.....
>
>
> Thanks a lot!!!!
>
>
- Follow-Ups:
- Re: Re: Phase Portrait
- From: Murray Eisenberg <murray@math.umass.edu>
- Re: Re: Phase Portrait