[R] rotating points on a plot

Prof Brian Ripley
Tue, 14 Oct 2008 02:32:14 -0000

On Mon, 13 Oct 2008, Richard E. Glor wrote:

> Anybody know how to rotate shapes generated with the 'points'
function?  I'm
> trying to place points around a radial diagram such that the y-axis of
> individual shapes are oriented with the radii of the circle rather than the
> y-axis of the larger plot area.  Perhaps something analogous to the
'srt' and
> 'crt' functions for text that appear under 'par'?

There is no provision for this in the graphics engine.  Assuming you are
talking about pch=1:14, they are just drawn as line segments and could be
done at R level by lines().  So I suggest writing an R-level emulation and
rotating the coordinate system in your emulation.

--
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