R help - Mar 2000 - loess.smooth dumps core

Has the loess.smooth() function changed? It used to work, but now it causes R
to abort with a segmentation fault. I stole the function points.lines() from
V&R 1st ed. pp. 67--68, but now it only works if I remove the line with
loess.smooth. Here's the function I'm using:

points.lines <- function(x, y, ...)
  {
    cor1 <-round(cor(x, y, use="pairwise"), digits=2)
    ok <- !(is.na(x) | is.na(y))
    points(x, y, ...)
    lines(loess.smooth(x=x[ok], y=y[ok]), col=3)
    abline(coef=c(0, 1))
    text(min(x, na.rm=T), max(y, na.rm=T), cor1)
  }

Is this a bug?
______________________________________________________________________
Stuart Luppescu         -=-=-  University of Chicago
$(B:MJ8$HCRF`H~$NIc(B        -=-=-  s-luppescu at uchicago.edu
http://www.consortium-chicago.org/people/sl/sl.html
ICQ #21172047  AIM: psycho7070
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                -- The Book of Bokonon / Kurt Vonnegut
Jr.
>> Sent on 28-Mar-00 at 14:57:50 with xfmail
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Stuart Luppescu <s-luppescu at uchicago.edu> writes:
> Has the loess.smooth() function changed? It used to work, but now it causes
R
> to abort with a segmentation fault. I stole the function points.lines()
from
> V&R 1st ed. pp. 67--68, but now it only works if I remove the line with
> loess.smooth. Here's the function I'm using:
> 
> points.lines <- function(x, y, ...)
>   {
>     cor1 <-round(cor(x, y, use="pairwise"), digits=2)
>     ok <- !(is.na(x) | is.na(y))
>     points(x, y, ...)
>     lines(loess.smooth(x=x[ok], y=y[ok]), col=3)
>     abline(coef=c(0, 1))
>     text(min(x, na.rm=T), max(y, na.rm=T), cor1)
>   }
> 
> Is this a bug?
Segmentation faults are always bugs (unless it is caused by your own C
code), but I can't make this happen on my system. Please tell us which
system you have and preferably also where about the problem appears
(provoking the fault while running under gdb is usually effective, as
is a subsequent 'bt' command) and/or give exact instructions how to
duplicate the problem.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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