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

From: Quin Wills <quin.wills_at_googlemail.com>
Date: Wed 22 Feb 2006 - 05:20:09 EST

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.  

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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