Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Other bug in ContourPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81733] Re: Other bug in ContourPlot
  • From: Bill Rowe <readnewsciv at sbcglobal.net>
  • Date: Tue, 2 Oct 2007 05:43:54 -0400 (EDT)

On 10/1/07 at 4:37 AM, misvrne at gmail.com (Miguel) wrote:

>If you run the ContourPlot a first time, it works fine. But, if you
>run ContourPlot again, the graphics previous or nothing is
>displayed.

>http://mathematicaes.googlegroups.com/web/ContourPlotBis.pdf

>The last version 6.0.1 is like a Gruyere chees: it is completed with
>innumerable holes.

Perhaps. But the example in the PDF file doesn't demonstrate a
bug with ContourPlot. The reason you get no curve in the second
plot is there are no solutions to

x^2/9 + y^2/16 == 25 in the region defined by -6 <= x <= 6 and
-6 <= y <= 6

Try doing:

sol = x^2/9 + y^2/16 - 25;
ContourPlot[sol == 0, {x, -20, 20}, {y, -20, 20}]

and you will see the curve lies outside the plot region you specified
--
To reply via email subtract one hundred and four


  • Prev by Date: Re: Sort problem
  • Next by Date: Re: Other bug in ContourPlot
  • Previous by thread: Re: Other bug in ContourPlot
  • Next by thread: Re: Other bug in ContourPlot