[R] plotting many line segments in different colors

roger koenker rkoenker at uiuc.edu
Fri Jul 2 23:47:09 CEST 2004


url:	www.econ.uiuc.edu/~roger        	Roger Koenker
email	rkoenker at uiuc.edu			Department of Economics
vox: 	217-333-4558				University of Illinois
fax:   	217-244-6678				Champaign, IL 61820

On Jul 2, 2004, at 4:33 PM, rif wrote:

> I want to plot a large number of line segments, with a color
> associated with each line segment (I'm actually plotting a function of
> the edges of a 2d graph, and I want to use color to indicate the level
> of the function.)  I originally thought I could use lines, but lines
> puts all its lines in one color (from help(lines), "col: color to use.
> This can be vector of length greater than one, but only the first
> value will be used.").
> Is there a function that does what I want?  Right now I'm using the
> obvious solution of calling lines in a loop with a single segment, but
> this is really quite slow for my purposes, as I have several thousand
> lines total to plot.
> Cheers,
> rif
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