[Rd] problem with zero-weighted observations in predict.lm?

Peter Dalgaard pdalgd at gmail.com
Thu Jul 29 09:43:41 CEST 2010

Prof Brian Ripley wrote:

> I think you will find that 'n' is used in several ways in predict.lm, 
> and since NA-handling was introduced in R 1.8.0 they may differ in 
> value.  So the safest route seems to be to change just 'n' in
>  		df <- n - p

Yes, that seems to fix things. Will commit to R-devel shortly.


Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

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