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