R help - Feb 2007 - Help on GAM

1) I have a semiparametric model, like
*Y~x1+s(x2)+s(x3)*
When I rum gam package I only obtained the estimates and the statistics of
the nonparametric part. How can I get the parametric part? Please could you
give me the complete comand to do it.

2) How are the negative coefficients identified. I run different examples
and I never got any negative parameters.

Thank you,

Dacha

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which library are you using for gam?

On 2/28/07, Dacha Atienza <dacha.atienza at gmail.com>
wrote:
> 1) I have a semiparametric model, like
> *Y~x1+s(x2)+s(x3)*
> When I rum gam package I only obtained the estimates and the statistics of
> the nonparametric part. How can I get the parametric part? Please could you
> give me the complete comand to do it.
>
> 2) How are the negative coefficients identified. I run different examples
> and I never got any negative parameters.
>
> Thank you,
>
> Dacha
>
>         [[alternative HTML version deleted]]
>
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http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
WenSui Liu
A lousy statistician who happens to know a little programming
(http://spaces.msn.com/statcompute/blog)

I want to do this model using mgcv

caco1.gam<-gam(caco1$Pa~s(caco1$T10)+s(caco1$S10)+s(caco1$C10), data=caco1)
But I want to indicate the degrees of freedom of each term, how I have to do
it?


Then, I saw that always the results refered to positive interactions, there
are not negative ones?

Thank you,

Dacha

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