[R] curves with shaded areas?

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Jul 22 13:18:27 CEST 2003

On Tue, 22 Jul 2003, Johannes Fuernkranz wrote:

> Prof Brian Ripley wrote:
> > See ?polygon, ?rect for how to shade areas.
> Thank you.
> This covers most but not all of my problems. :-)
> > If you make a plot with abline, surely it has no curves (only straight 
> > lines)?
> Right, sorry. I was a bit over-simplifying my problem, because I thought 
> this can be done with a general plot parameter (something like lty), and 
> most of the graphs I am plotting are actually straight regression lines.
> The tougher cases are those wher I want to shade the area inside / 
> outside a specific contour line (produced with 'contour'). Can this be 
> done as well?

?filled.contour with a single contour may help.  Otherwise I think you
need the clines package (from Paul Murrell,
http://www.stat.auckland.ac.nz/~paul/) and use polygon on its output.

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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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