[R] how to plot implicit functions
David Winsemius
dwinsemius at comcast.net
Sat Dec 13 04:30:38 CET 2008
The answer I have seen before on this list (but cannot find at the
moment) was a suggestion to solve for one of the variables in terms of
the other two and then plot with standard 3d plotting routines. I also
seem to remember that some of the examples in an RGL vignette had
examples of graphed "implicit functions". I call them parametric
fucntions, but that term is used in so many other ways that prevent
effective searching.
Searching on "rgl parametric function" produced this possibly relevant
hit (among others):
http://finzi.psych.upenn.edu/R/library/misc3d/html/parametric3d.html
--
David Winsemius
On Dec 11, 2008, at 12:57 PM, YIHSU CHEN wrote:
> Dear R users --
>
> I think this question was asked before but there was no reply to it.
> I would appreciate any suggestion any of you might have. I am
> interested in plotting several "implicit functions" (F(x,y,z)=0) on
> the same fig. Is there anyone who has an example code of how to do
> this?
>
> Thank you
>
> Yihsu
>
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