[R] funny arrows

[Peter Dalgaard BSA]

"Ritter, Christian C SRTCL-CTGAS" <Christian.C.Ritter at OPC.shell.com> writes:

> The result of 
> > plot(c(-1,1),c(-1,1),type="n")
> > arrows(0,0,1,1)
> > arrows(0,0,0,0)
> is not what I expected. The first arrow is drawn correctly. The second
> does not collapse to a point but goes from (0,0) off to
> (-infinity,infinity).
> I guess something is divided by zero in the internal function.

R-1.1.1 on Linux behaves OK (if a lonely arrowhead at (0,0) pointing
left is OK)

-- 
   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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