Here's one possible fix (may not be very efficient).
Change lines 82-83 in $R_HOME/src/base/R/plot.lm.R to the following:
if (id.n > 0) {
qqx <- rep(NA, n)
qqy <- rep(NA, n)
qqx[!is.na(rs)] <- qq$x
qqy[!is.na(rs)] <- qq$y
text.id(qqx[show.rs], qqy[show.rs], show.rs, adj.x = TRUE)
}
Andy
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]
> Sent: Thursday, August 14, 2003 6:38 PM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: [Rd] plot.lm mislabels points with na.exclude (PR#3750)
>
>
> R 1.7.1 on Windows XP
>
> The "normal Q-Q plot" produced by plot.lm() mislabels points
> when the model is fitted using na.action=na.exclude. Example:
>
> x <- 1:50
> y <- x + rnorm(50)
> y[c(5,10,15)] <- NA # insert some NA's
> y[40] <- 50 # add an outlier
> plot(lm(y ~ x, na.action=na.omit)) # outlier correctly
> labeled in all
> # four plots
> plot(lm(y ~ x, na.action=na.exclude)) # labels attached to
> wrong points
> # in the QQ plot (only)
>
>
> Rich Raubertas
> Biometrics Research
> Merck & Co.
>
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