[R] multiple persp plots

[Prof Brian Ripley]

On Tue, 7 Aug 2001, Philippe Grosjean wrote:

> Hello,
>
> I would like to plot two superposed surfaces (original data, and smoothed
> models). Basically, I would like to create a usual persp plot with box, and
> then superpose a second surface (without box and axes) on the top plane of
> the box defined by the first graph. I don't know if it is clear :-(
> Is it possible to draw such a second surface in an existing persp plot in R?
>
> Another (related) question: once upon a time, it was a 'funfits' library in
> CRAN. I don't find it on CRAN any more. Is it defunct? I installed an old

Yes. It had been in Devel for a long time until a week or two ago.  There
were licensing issues with it.

> version 2.0.3 of this library. In the help files, there is a mention about
> functions like persp.text, persp.points, persp.lines to add features in an
> existing persp plot... but I don't find them. Do these functions exist
> somewhere? Are they replaced by other functions?

I think funfits has been superseded by fields on CRAN.
I believe the functions you mention were from the S original and not
operational in R.  R lacks the perspp function used with S's persp to add
to plots.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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