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

From: Christian Ritz <>
Date: Wed 22 Feb 2006 - 20:22:20 EST

Hi Quin,

the package 'drc' on CRAN deals with modelling dose-response curves.

Moreover it allows adjustment for heterogeneity by means of

  transformation (Box-Cox transformation)

  modelling the variance as a power of the mean.

See the package documentation for more features.

Christian mailing list PLEASE do read the posting guide! Received on Wed Feb 22 20:33:26 2006

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