[R] LogLik of nls

[Bert Gunter]

methods(logLik)   ## for S3 methods
stats:::logLik.nls
### and look at the code!

-- Bert

On Thu, Jan 31, 2013 at 12:06 PM, Diviya Smith <diviya.smith at gmail.com> wrote:
> Hello there,
>
> Can anyone point me to the code for logLik of an nls object? I found the
> code for logLik of an lm but could not find exactly what function is used
> for calculating the logLik of nls function?
>
> I am using the nls to fit the following model to data -
> Model 1: y ~ Ae^(-mx) + Be^(-nx) +c
>
> and want to understand what is the likelihood function used by nls.
> Presumably it is using -
> N(Ae^(-mx) + Be^(-nx) +c, var = residuals from nls)
>
> Thank  you in advance,
>
> Diviya
>
>         [[alternative HTML version deleted]]
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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