Re: Problem with ContourPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg9872] Re: [mg9824] Problem with ContourPlot
- From: David Withoff <withoff>
- Date: Sat, 29 Nov 1997 00:11:00 -0500
- Sender: owner-wri-mathgroup at wolfram.com
> Can anyone explain why the following function doesn't plot anything at
> the origin? The function becomes zero at the origin.
>
> ContourPlot[(-8726808064423900632*x^2 + 8759151125192924604*x^3 -
> 29584563748339932*x^4 + 17534318270560862222*x*y -
> 8712453993364397598*x^2*y -
> 8756566774424639400*x^3*y -8845706882530353348*y^2 -
> 8768699986248057285*x*y^2
> + 17515308156991040723*x^2*y^2 + 8814402420709229988*y^3
> -8815332906945153323* x*y^3 + 32011032025269888*y^4), {x,-0.1,0.1},
> {y,-0.1,0.1}, ContourShading -> False, Contours -> {0}, ContourLines
> -> True, PlotPoints -> 201, Axes -> True, AxesOrigin -> {0,0},
> AxesStyle -> Dashing[{0.01,0.03}], AxesLabel -> {"x","y"}, PlotLabel
> -> "label"]
>
>
> Regards
>
> Stefan Becuwe
>
> Stefan.Becuwe at uia.ua.ac.be
Is there a curve in the range {x,-0.1,0.1}, {y,-0.1,0.1} along which
this expression is zero? If there isn't, then Contours -> {0} won't
lead to any contours.
Dave Withoff
Wolfram Research