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MathGroup Archive 2005

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Re: Most plotting not working...?

  • To: mathgroup at
  • Subject: [mg54531] Re: [mg54480] Most plotting not working...?
  • From: DrBob <drbob at>
  • Date: Tue, 22 Feb 2005 04:24:05 -0500 (EST)
  • References: <>
  • Reply-to: drbob at
  • Sender: owner-wri-mathgroup at

The usual cause of this is trying to use PlotVectorField BEFORE loading the library. If you've done that, loading the library doesn't fix the problem unless you Remove[PlotVectorField] first. (That removes the Global instance created when you tried to use the undefined symbol.)


On Mon, 21 Feb 2005 03:44:48 -0500 (EST), EKH <hall at localhost.localhost> wrote:

> Hi all - I know that this is going to be dumb, but I can't for the life of
> me figure it out. It's probably too simple.
> First, I loaded the Graphics`PlotField` lib. Now, when I go through the
> ListPlotVectorField demo that creates the random varray and then pipes it
> through the ListPlotVectorField[varray] it just spits forth all of the
> numbers without drawing it.
> When I try other demos it just spits them back at me:
> In[49]:= PlotVectorField[{Sin[x], Cos[y]}, {x, 0, Pi}, {y, 0, Pi}]
> Out[49]:= PlotVectorField[{Sin[x], Cos[y]}, {x, 0, \[Pi]}, {y, 0, \[Pi]}]
> I know this is simple. Any help?

DrBob at

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