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Topic: phase portraits
Replies: 6   Last Post: Feb 5, 2011 5:45 AM

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Posts: 893
Registered: 10/6/08
Re: phase portraits
Posted: Feb 4, 2011 6:58 AM
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On Feb 4, 7:44 am, James <> wrote:
> Hi,
> By far the nicest function in Mathematica to use for phase portraits is StreamPlot. I believe that was a V7 feature. For example, take:
> dx=x^2+2xy+y
> dy=2x-3y^2
> then:
> StreamPlot[{x^2+2xy+y,2x-3y^2},{x,-5,5},{y,-5,5}]
> will draw a nice phase portrait.

It will draw a nice portrait if you put a space between the x and y.

Cheers -- Sjoerd

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