[R] density ellipses?

Kaspar Pflugshaupt pflugshaupt at geobot.umnw.ethz.ch
Wed Mar 22 16:56:07 CET 2000


has anybody written a function to plot density ellipses (95%, 99% or
anything) in a scatterplot? I found nothing in any package, nor in the list

There does seem to be a contributed package "ellipse" for S-Plus (on
S-Archive), but it does a lot more than what I would need. Still, if anybody
ported it to R, I'd be grateful for a link. I'm a bit afraid to try the port
myself, since the routines do some magic with postscript preambles that I
don't understand.

Or is there a simple way to implement it myself? The axis directions could
be extracted from princomp, but how would one plot the ellipses?

Thanks for any tips



Kaspar Pflugshaupt
Geobotanisches Institut
Zuerichbergstr. 38
CH-8044 Zuerich

Tel. ++41 1 632 43 19
Fax  ++41 1 632 12 15

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