Re: ImplicitPlot and ContourPlot problem
- To: mathgroup at smc.vnet.net
- Subject: [mg38151] Re: ImplicitPlot and ContourPlot problem
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 4 Dec 2002 03:23:05 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <asi03m$eof$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
If you give two coordinates as in
ImplicitPlot[Sqrt[x-y]==0,{x,0,10},{y,0,10}]
simply call ContourPlot[]
Sqrt[x-y] ist complex for x<y and ContourPlot[]
can only handle real-vauled functions.
Regards
Jens
Marco wrote:
>
> Hi,
> I type the following:
> ImplicitPlot[Sqrt[x-y]==0,{x,0,10}]
> and all ok,
> but if i try to use ContourPlot in the following manner
> ImplicitPlot[Sqrt[x-y]==0,{x,0,10},{y,0,10}]
> it say:
> ContourGraphics::"ctpnt": "The contour is attempting to traverse a cell in
> which some of the points have not evaluated to numbers, and it will be
> dropped."
> I have not understud why.
> Some one can help me?
> Thanks.