In response to your last question --
Duncan already gave you the answer in his last e-mail -- to give
an explicit example, for a particular set of means and
variance-covariance matrix:
library(rgl)
demo(shapes3d)
rgl.clear()
sphere <- ellipsoid3d(2,2,2,qmesh=TRUE)
means <- c(0,0,0)
S <- ma
; [mailto:[EMAIL PROTECTED] On Behalf Of Duncan Murdoch
> Sent: Thursday, February 02, 2006 6:22 PM
> To: Michael
> Cc: r-help@stat.math.ethz.ch; Ben Bolker
> Subject: Re: [R] is there a way to visualize 3D normal distributions?
>
> On 2/2/2006 5:01 PM, Michael wrote:
> &
On 2/2/2006 5:01 PM, Michael wrote:
> shape3d only gives rigid sphere... not the free form ellipsoid that I
> want...
? If you run the demo, you'll see ellipsoids...
You just need to work out the appropriate transform to apply to a sphere
to get the ellipsoid you want. I imagine something like
Michael wrote:
> shape3d only gives rigid sphere... not the free form ellipsoid that I
> want...
>
one or the other of us is missing something.
after running demo(shapes3d)
[to define ellipsoid3d] and rgl.clear(),
s1 <- ellipsoid3d(qmesh = TRUE, trans = diag(4))
shade3d(rotate3d(scale3d
---
>
> > -Original Message-
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] On Behalf Of Michael
> > Sent: Thursday, February 02, 2006 3:39 AM
> > To: R-help@stat.math.ethz.ch
> > Subject: [R] is there a way to visualize 3D normal distri
shape3d only gives rigid sphere... not the free form ellipsoid that I
want...
On 2/2/06, Ben Bolker <[EMAIL PROTECTED]> wrote:
>
> Duncan Murdoch stats.uwo.ca> writes:
>
> >
> > On 2/2/2006 3:39 AM, Michael wrote:
> > > Hi all,
> > >
> > > How do I visualize a contour of a tri-variate normal dist
lto:[EMAIL PROTECTED] On Behalf Of Michael
> Sent: Thursday, February 02, 2006 3:39 AM
> To: R-help@stat.math.ethz.ch
> Subject: [R] is there a way to visualize 3D normal distributions?
>
> Hi all,
>
> How do I visualize a contour of a tri-variate normal distribution?
>
>
Duncan Murdoch stats.uwo.ca> writes:
>
> On 2/2/2006 3:39 AM, Michael wrote:
> > Hi all,
> >
> > How do I visualize a contour of a tri-variate normal distribution?
> >
> > I just like to see the ellipsoid very much. I hope there is a easy way or
> > existing method in R.
>
> The misc3d packag
On 2/2/2006 3:39 AM, Michael wrote:
> Hi all,
>
> How do I visualize a contour of a tri-variate normal distribution?
>
> I just like to see the ellipsoid very much. I hope there is a easy way or
> existing method in R.
The misc3d package includes a function for 3d contour plots; that should
do
Hi all,
How do I visualize a contour of a tri-variate normal distribution?
I just like to see the ellipsoid very much. I hope there is a easy way or
existing method in R.
Thank you a lot!
Michael.
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