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MathGroup Archive 2007

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Re: Crinkled Hyperbola (ContourPlot in Manipulate)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77874] Re: Crinkled Hyperbola (ContourPlot in Manipulate)
  • From: Peter Breitfeld <phbrf at t-online.de>
  • Date: Tue, 19 Jun 2007 06:28:55 -0400 (EDT)
  • References: <f532pg$3d4$1@smc.vnet.net>

Bruce Colletti schrieb:
> Re Mathematica 6.0 under WinXP.
>
> As the slider moves, a point glides along the hyperbola:  
>
> Manipulate[ContourPlot[x^2-y^2==1,{x,-3,3},{y,-3,3},Epilog->{
> PointSize at 0.02,Point@{Cosh@h,Sinh@h}}],
> {h,-1.5,1.5}]
>
> However, the moving point crinkles the plot, which restores itself when the mouse button is released.
>
> What causes the crinkling (this seems tied to ContourPlot, since no crinkling occurs when I use Plot[Sqrt[x^2-1],...])?
>
> Thankx.
>
> Bruce
>

If you increase the number of PlotPoints e.g. PlotPoints->50 there
is no more crinkling.

Gruss Peter
-- 
==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==
Peter Breitfeld, Bad Saulgau, Germany -- http://www.pBreitfeld.de


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