R help - Aug 2005 - fit non linear model using weighted least squares

Dear all, 

I am new in using R.

 

I'd like to fit a non linear model using weighted least squares.

I am using the gnls function but I don't know how to perform a weighted
least squares (my weights are a "simple" colum of data).

 

Thank you in advance, 

Gian Luca

 


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Di Tanna Gian Luca <GDiTanna <at> Regione.Emilia-Romagna.it> writes:
> I'd like to fit a non linear model using weighted least squares.
> I am using the gnls function but I don't know how to perform a weighted
> least squares (my weights are a "simple" colum of data).
In your case it probably would be easier to use nls (in stats) instead of gnls. 
There is an example using weighting on the help-page.

Dieter Menne