[R] contours/density lines in sm library

Prof Brian D Ripley ripley at stats.ox.ac.uk
Tue Jun 13 08:25:43 CEST 2000

On Tue, 13 Jun 2000 markhall at gol.com wrote:

> Hi,
> I'm using R 1001 for Windows NT and the sm library.  I'm trying to 
> create plots for my data set like Bowman and Azzalini have in Figure 1.8
> (p. 9) of their book for my data (i.e. a contour plot for each group in my 
> data set and its all plotted on 1 plot).  
> The problem I'm having is that R is not drawing closed contour lines for each
> group.  Sometimes it does; other times it draws 1/2 to 3/4ths of the contour 
> line but stops.  I could understand if it did this when there was overlap,
> but when the groups are separated at the 75% level, it doesn't make sense to me
> on why this happening.
> Any insites on solving this problem would be appreciated.
> If anybody wants to see the resulting plot, I'm happy to fax it to them.

(Um. So what device were you using?)

That example is given by sm.script(air_cont).  The solid contour is not
quite closed on all platforms I tried, but the other two are. That includes
rw1001 on NT.  The solid contour is also not closed on the S-PLUS original.

Either you have not followed the script exactly or there is problem
specific to your graphics card / printer / ....

Please do read the section on reporting bugs in the FAQ.  Without exact
instructions for what you did there is no way we could reproduce this.

Potential bugs in add-on packages are best reported to the authors/porters,
not all of whom read R-help.

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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