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

5 messages · Ross Ihaka, Göran Broström, Peter Dalgaard +2 more

#
Brian D Ripley writes:

	Interactive rotation of perspective plots would be a great
	boon, as would shading options for perspective plots, including
	contouring on such plots.

I am envisioning a division into static and dynamic plots.  The static
version will concentrate on rendering as nice a picture as possible -
anti-aliasing (if supported) arbitrary text rotation etc, whereas the
dynamic version will shoot for speed.  It would be possible to use
direct manipulation in a dynamic plot of a wire-frame to select a
viewing direction and then have a nicely rendered version of the
surface produced in a separate (static) plot.

This separation is motivated by the fact that there will soon be some
rather nice rendering tools available for Unix/Linux (anti-aliasing
built-in), but their performance will be limited.  One day we will all
have OpenGL hardware acceleration and then we can have just one
graphics system (maybe).

Shading is possible with the current version of "persp", but you
have to compute the shades yourself :-(.  An automated version of this
is on my list, as is contouring on (and under) the rendered surface
and draping.

Of course, as always, limited resources may well curtail what we can
produce.  I giving fairly high priority to being able to draw maps, as
that is something I personally will need for teaching.

	Ross
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#
I have a slightly off-topic question, but I think I got it
originally from this list:

I am looking for an article (probably to some mailing-list)
titled "A Statistical Scandal" (I think), which I once have
seen, but now cannot find. It was about how bad some 
statistical packages handles certain tasks. I also remember
the phrase "four-letter acronym" regarding the name of
one such package.

Can anyone help me finding this article? Thanks!

--------------------------------------------------------------
 G?ran Brostr?m
 Department of Statistics              tel: +46 90 786-5223
 Ume? University                       fax: +46 90 786-6614
 S-90187 Ume?, Sweden               e-mail:  gb at stat.umu.se

 http://www.stat.umu.se/~gb          ftp://capa.stat.umu.se
--------------------------------------------------------------

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#
Goran Brostrom <gb at stat.umu.se> writes:
It was on Allstat (find the online archive with yor favourite search
machine). End of September, I believe.
#
On 04-Dec-98 Goran Brostrom wrote:
Your uncertainly remembered information is sufficient for unique
identification!

Written by John Nelder, it was forwarded to Allstat 28 September:

http://www.mailbase.ac.uk/lists/allstat/1998-09/0132.html

with followups:

http://www.mailbase.ac.uk/lists/allstat/1998-09/0141.html
http://www.mailbase.ac.uk/lists/allstat/1998-09/0142.html
http://www.mailbase.ac.uk/lists/allstat/1998-09/0146.html
http://www.mailbase.ac.uk/lists/allstat/1998-09/0147.html
http://www.mailbase.ac.uk/lists/allstat/1998-09/0151.html
http://www.mailbase.ac.uk/lists/allstat/1998-09/0152.html

Best wishes,
Ted.

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E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk>
Date: 04-Dec-98                                       Time: 14:27:04
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#
On 04-Dec-98 Goran Brostrom wrote:
It is an e-mail from John Nelder.  I saw this on the "allstat"
mailing list, although of course it may be available elsewhere.
It is archived at

http://www.mailbase.ac.uk/lists/allstat/1998-09/0132.html

Martyn
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