Re: Software to create 3-D scatterplot with regression plane

David A. Heiser wrote:
"David Winsemius" <doe_snot@xxxxxxxxxxx> wrote in message news:Xns9938E61D7D634dwtttttt@xxxxxxxxxxxxxxxxx
Bruce Weaver <bweaver@xxxxxxxxxxxx> wrote in
news:f2vrj001std@xxxxxxxxxxxxxxxxx:

Can anyone recommend software that will create a nice looking 3-D
scatter-plot (two predictors, one outcome) and display the regression
plane? A free standalone package would be ideal. Does KY-Plot do this?
In R, that facility is provided by the cloud() function from the lattice
package or scatterplot3d() in the scatterplot3d package.

Worked examples at the R Graphics Gallery:
<http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=41>
<http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=44>
<http://addictedtor.free.fr/graphiques/graphcode.php?graph=116>

--
David Winsemius
+++++++++++++++++++++++++++++
Appreciate the information, but R Graph Gallery displays just don't do it. For 3 d plots on a flat screen, you need the viewers ability to rotate the image just like you would rotate a cube in your hand. The viewer should be able to change backgrounds so as to be able to contrast parts of the plot and with the reference axis.

DAHeiser



I don't disagree with you, David. However, I will be using the plot on a poster, so animation will not be possible.

I made my initial post after seeing the 3D scatter-plot you get from the "legacy" version in SPSS. It does not look good (the corner that is furthest from the viewer looks like it is nearest), and does not plot the regression plane. It only occurred to me later to try the "interactive graphics" version in SPSS, and it produces a much better looking plot (with regression plane) after a little fiddling.

Thanks to everyone who replied.
Cheers,
Bruce

--
Bruce Weaver
bweaver@xxxxxxxxxxxx
www.angelfire.com/wv/bwhomedir
.

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