Re: Strange error when using InequalityPlot3D

• To: mathgroup at smc.vnet.net
• Subject: [mg60438] Re: Strange error when using InequalityPlot3D
• From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
• Date: Fri, 16 Sep 2005 03:49:56 -0400 (EDT)
• Organization: Uni Leipzig
• References: <dgbeu3\$fo7\$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

```Hi,

what may
Needs["Graphics`ContourPlot3D`"]

ContourPlot3D[chi2[z1,q0,q1,.6433]-
180,{z1,.1,.6},{q0,-3,1},{q1,-1,3}];

do ??

Regards
Jens

"flatuniverse" <flatuniverse at gmail.com> schrieb im
Newsbeitrag news:dgbeu3\$fo7\$1 at smc.vnet.net...
| 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
|

```

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