Re: Strange RegionPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg81558] Re: [mg81532] Strange RegionPlot
- From: DrMajorBob <drmajorbob at bigfoot.com>
- Date: Wed, 26 Sep 2007 21:53:20 -0400 (EDT)
- References: <21620273.1190836738082.JavaMail.root@m35>
- Reply-to: drmajorbob at bigfoot.com
That does seem odd! Increasing PlotPoints helps, though:
RegionPlot[x + y < 4 && x - y > 3, {x, -20, 25}, {y, -20, 10},
PlotPoints -> 100]
Or better yet:
RegionPlot[x + y < 4 && x - y > 3, {x, -20, 25}, {y, -20, 10},
MaxRecursion -> 5]
Default recursion is only 3 for this plot, apparently.
Bobby
On Wed, 26 Sep 2007 05:53:50 -0500, 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
>
>
--
DrMajorBob at bigfoot.com