Re: Strange error when using InequalityPlot3D
- To: mathgroup at smc.vnet.net
- Subject: [mg60422] Re: Strange error when using InequalityPlot3D
- From: dh <dh at metrohm.ch>
- Date: Fri, 16 Sep 2005 03:49:01 -0400 (EDT)
- References: <dgbeu3$fo7$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
silly mistakes produce stupid output.
The Equal operator is written: ==, this is only too often confused with =.
= is the Set operator that sets the left hand variable to the value of
the right side.
sincerely, Daniel
flatuniverse wrote:
> Hi All. I'm trying to visualize chi-squared contours for a 3 parameter
> fit. I can take 2D slices of the contours using ContourPlot, but I'd
> like to see the function in 3D. So I have a function chi2[], and to
> see the chi^2=180 contour, I use the following:
>
> InequalityPlot3D[chi2[z1,q0,q1,.6433]=
> 180,{z1,.1,.6},{q0,-3,1},{q1,-1,3}];
>
> which produces the error,
>
> InequalityPlot3D::region: The region defined by <<1>> could not be
> broken down into cylinders.
>
> What's going on here? Is there a better way to see this function in
> 3D?
>
> Thanks
>