[R] Weighted nls

Peter Dalgaard p.dalgaard at biostat.ku.dk
Mon Jul 11 19:52:14 CEST 2005

"Rundle, Daniel" <stdmr03 at moravian.edu> writes:

> Dear R Community,
> I am attempting to perform a weighted non-linear least squares fit.
> It has already been noted that the weights option is not yet
> implemented for the nls function, but no one seems to offer any
> suggestions for getting around this problem. I am still curious if
> a) anyone has code they have written which includes a weight options
> for nls, or b) if there is another model which would allow least
> squares fitting to a non-linear function.

gnls in the nlme package. Or follow the example on help(nls) immediately
after the      

## weighted nonlinear regression


   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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