[R] plotting many line segments in different colors

Peter Dalgaard p.dalgaard at biostat.ku.dk
Fri Jul 2 23:44:02 CEST 2004

rif <rif at MIT.EDU> writes:

> I want to plot a large number of line segments, with a color
> associated with each line segment 
> 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.

I don't know how to break this to you, but....

Have you considered segments()?

> plot(1:10,1:10)
> segments(1:9,1:9,2:10,2:10,col=1:9,lwd=3)

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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