[Rd] lm, weights and ...

[hadley wickham]

> lm2 <- function(...) lm(...)
> lm2(mpg ~ wt, data=mtcars)

Call:
lm(formula = ..1, data = ..2)

Coefficients:
(Intercept)           wt
     37.285       -5.344

> lm2(mpg ~ wt, weights=cyl, data=mtcars)
Error in eval(expr, envir, enclos) : ..2 used in an incorrect context,
no ... to look in


Can anyone explain why this is happening?  (Obviously this is a
manufactured example, but it crops up in ggplot when you want to
provide a function to perform smoothing)

Thanks,

Hadley