Data?

On Thu, Jun 3, 2010 at 1:24 PM, natalieh <fbsnch@leeds.ac.uk> wrote:

>
> Hi all,
>
> I'm trying to use a gam (mgcv package) to analyse some data with a roughly
> U
> shaped curve. My model is very simple with just one explanatory variable:
>
> m1<-gam(CoT~s(incline))
>
> However I just keep getting the error message
>
> "Error in smooth.construct.tp.smooth.spec(object, dk$data, dk$knots) :
>  A term has fewer unique covariate combinations than specified maximum
> degrees of freedom"
>
> Just wondering if anyone had come across this before/ could offer any
> advice
> on where the problem might lie
>
> Many thanks,
>
> Natalie
>
>
>
> --
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>
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