graphics bug: type="l" (PR#120)

[Peter Dalgaard BSA]

mcw@ln.nimh.nih.gov writes:

> The following commands illustrate a problem with graphing relatively large
> data sets using the "line" option to plot:
> 
> temp <- runif(200000)  # or whatever other numbers you like;
> 			# same thing happens with a sine wave
> plot(1:200000, temp)    # everything fine
> plot(1:200000, temp, type="l")   # data gets cut off
> 
> 
> The number of points isn't crucial.  The cutoff point appears to be about
> 65,000 points.  (70,000 points demonstrates the cutoff; with 50,000 points
> there's no cutoff.) 
> 
> As far as I can tell, the problem only occurs when using the
> option type="l".  It's unaffected by color, line type, and line width.
> 
> Matt Wiener

Doesn't happen to me with 0.63.pre-3 on RedHat Linux. I can't offhand
see any documented fixes that would affect this, perhaps there's an OS
difference? Looks a bit like a short integer overrun (65536=2^16)

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