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MathGroup Archive 2007

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Re: Strange RegionPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81550] Re: [mg81532] Strange RegionPlot
  • From: "Ricardo Samad" <resamad at gmail.com>
  • Date: Wed, 26 Sep 2007 21:49:14 -0400 (EDT)
  • References: <200709261053.GAA09604@smc.vnet.net>

Dear Bruce,

Increase the plotting resolution using the PlotPoints option:

RegionPlot[x + y < 4 && x - y > 3, {x, -20, 25}, {y, -20, 10},
 PlotPoints -> 100]

Ricardo


On 9/26/07, Bruce Colletti <vze269bv at verizon.net> wrote:
>
> Re 6.0.1 under Windows XP.
>
> The region returned by:
>
> RegionPlot[x + y < 4 && x - y > 3, {x, -20, 25}, {y, -20, 10}]
>
> should be triangular.  Yet the apex is a short line segment and not a
> vertex.
>
> What creates this segment, and what must one do to get the
> vertex?  Thankx.
>
> Bruce
>
>


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