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Re: plot ellipsoidal normal


From: Ben Abbott
Subject: Re: plot ellipsoidal normal
Date: Mon, 27 Jun 2011 10:21:05 -0400

On Jun 27, 2011, at 7:17 AM, Clara Brück wrote:

> Hello,
> 
> I've got an ellipsoid as a 3D-Graph:
> 
> #Ellipsoid
> xc=0
> yc=0
> zc=0
> xr=yr= 7000
> zr=5000
> n = 25
> [A,B,C] = ellipsoid(xc,yc,zc,xr,yr,zr,n);
> mesh(A,B,C)
> 
> Then I have a Point on the surface.:
> 
> p2= [A(17,20) B(17,20) C(17,20)];
> 
> How can I plot a line, that goes orthogonal to the surface in this point, to 
> the middle (z-axis)?
> 
> Hope someone's got an idea.
> 
> Greetings
> Clara

You can use surfnorm() to calculate the normal to the ellipsoid surface.

Ben




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