[R] R² for non-linear model

[Bert Gunter]

Is there any way that this could be made into a fortune -- perhaps by
omitting the poster's identity?

"yes there are threads concidering this topic but they are all about the
theory not about how to get the value of r^2 for a non-linear model in R."

:=)

Cheers,
Bert

Anna: I say this because you have just been told that the "theory"
tells you that you CANNOT calculate R^2 for a nonlinear model.


On Wed, Mar 16, 2011 at 10:25 AM, Anna Gretschel <ana-lee at web.de> wrote:
> Am 16.03.2011 18:15, schrieb David Winsemius:
>>
>> On Mar 16, 2011, at 12:53 PM, Anna Gretschel wrote:
>>
>>> Dear List,
>>>
>>> how can I obtain the value of r suqared for a non-linear model? For
>>> linear models it can be found in the summary() of the model but for
>>> non-linear models I just don't know. Please help!
>>
>> You should do more searching. I can remember at least two threads in the
>> last few years that discussed this issue.
>>
> yes there are threads concidering this topic but they are all about the
> theory not about how to get the value of r^2 for a non-linear model in R.
>
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-- 
Bert Gunter
Genentech Nonclinical Biostatistics