[R] Non linear modeling

Liaw, Andy andy_liaw at merck.com
Fri Mar 18 14:56:38 CET 2005


AFAIK most model fitting techniques will only deal with additive errors, not
multiplicative ones.  You might want to try fitting:

log(y-x) = a*x + e

which is linear.

Andy

> From: Angelo Secchi
> 
> Hi,
> is there a way  in R to fit a non linear model like
> 
> y=x+exp(a*x)*eps
> 
> where a is the parameter and eps is the error term? 
> Thanks
> Angelo
> 
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