[R] How to get around heteroscedasticity with non-linear least squares in R?

[Kjetil Brinchmann Halvorsen]

Quin Wills wrote:
> I am using "nls" to fit dose-response curves but am not sure how to approach
> more robust regression in R to get around the problem of the my error
> showing increased variance with increasing dose.  
> 

package "sfsmisc"  has rnls (robust nls)
which might be of use.

Kjetil

>  
> 
> My understanding is that "rlm" or "lqs" would not be a good idea here.
> 'Fairly new to regression work, so apologies if I'm missing something
> obvious.
> 
>  
> 
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