contour labelling [was "Re: [R] image ()"]

Prof Brian D Ripley ripley at
Fri Dec 4 08:34:26 CET 1998

On Thu, 3 Dec 1998, Ben Bolker wrote:

> On Fri, 4 Dec 1998, Ross Ihaka wrote:
> > I have a paid ``volunteer'' who started work yesterday.  His job will
> > include upgrading contour, image, persp etc.  In addition I hope that
> > he will also add some mapping facilities along the lines of GMT (using
> > their shoreline database).
>   Great!
> > 
> > Now would be a good time to make suggestions about desirable features.
>   - ability to save and re-plot contours (e.g., for doing contours with
> annotation, or selecting different pieces of a contour "object")
>   - a good way to save the state of the last perspective used (in S-PLUS
> 3.3 and earlier you have to keep a "perspective" object around and pass it
> with every call
>   - flexible ways of specifying 3-D objects to add to a perspective plot,
> grids for back and sides of plot space, etc.
>   I always found the S-PLUS 3-D plotting routines klugey and fragile (for
> example, you had to play around a lot with margins a lot in non-obvious
> ways just to get things to show up on the plot) and it would/will be
> lovely to have open, robust 3-D plotting primitives.

I assume that means S 3-D plotting routines: the last five years have
brought Trellis and Axum versions to S-PLUS. Interactive rotation of
perspective plots would be a great boon, as would shading options for
perspective plots, including contouring on such plots. 

Brian D. Ripley,                  ripley at
Professor of Applied Statistics,
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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