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Re: RegionPlot3d under sampling plot points?

  • To: mathgroup at
  • Subject: [mg99455] Re: RegionPlot3d under sampling plot points?
  • From: Jens-Peer Kuska <kuska at>
  • Date: Wed, 6 May 2009 05:22:49 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <gtp1g4$k4c$>
  • Reply-to: kuska at


PlotPoints -> {32, 32, 32}*{1728,1,1728}

may help, but will take a bit longer.


gramathon wrote:
> Hi All,
> I am new to Mathematica, so apologies ahead of time if this is a silly
> problem. I am trying to use RegionPlot3D to plot the following,
> RegionPlot3D[
>  2 x(y - 1) <= 2.5  z+ 2 (y - 1)  z&& z<= x, {x, 1,
>   864000}, {y, 2, 500}, {z, 1, 864000}, PlotStyle -> Orange,PlotPoints-
>> 100]
> The problem is I end up getting gaps in regions where I expect none to
> exist.
> - I tried increasing the PlotPoints.Though that reduces the number of
> gaps at first (partly removes the gaps for the higher values of NA and
> NP but gaps remain, in the lower values of the two axises) after a
> certain number of point >= PlotPoints -> 150the graph ends up looking
> completely different with Spikes everywhere and still has gaps which
> does not make sense....(I am not sure if this could be due to the
> graphics card because the above code is relatively smoother on my less
> powerful machine but still has gaps)
> - I tried providing different plotpoints to different axises E.g.
> PlotPoints-> {111,100,111}... but that did not seem to help either.
> - I tried MaxRecursion as well but that does not seem to help in this
> case either...
> I am completely lost, and have been spending quite a bit of time
> trying to search for an answer...WOULD REALLY APPRECIATE it if anyone
> could Help
> Thanks a bunch GUYS
> Version  7 of Mathematica

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