[R] problem w/ lm() ?

Peter Dalgaard BSA
Wed, 13 Jan 1999 17:51:03 -0000

"Francisco Cribari" <cribari at de.ufpe.br> writes:

> Any thoughts on the following? Am I missing something? [I am running R
> for Windows 0.63.1 on a Win NT 4.0 (workstation, sevice pack #4) box.]
> Thanks. FC.
...
> > data(women)
> > names(women)
> [1] "height" "weight"
> > summary(lm(weight ~ height, data = women))
>
> Call:
> lm(formula = weight ~ height, data = women)
>
> Residuals:
>     Min      1Q  Median      3Q     Max
> -1.7333 -1.1333 -0.3833  0.7417  3.1167
>
> Coefficients:
> Error: binary operator applied to invalid types

This works on Unix 0.63.1, so no, you're not missing anything. Unless
you have something important redefined when you load your workspace.

To help debugging in, perhaps you could try something like:

hw.sum <- summary(lm(weight ~ height, data = women)) # avoids printing
hw.sum # I believe this provokes the error
traceback()
print.default(hw.sum)
debug(print.summary.lm)
hw.sum


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