R help - Apr 2005 - anova with gam?

Hello. In SPLUS I am used to comparing nested models in gam using the
anova function.  When I tried this in R this doesn't work (the error
message says that anova() doesn't recognise the gam fit).  What must I
do to use anova with gam?  To be clear, I want to do the following:

fFit1<-gam(y~x,.)

fit1<-fam(y~s(x),.)

 

anova(fit2,fit1,test="F")

 

Thanks.

 

Bill Shipley

 


	[[alternative HTML version deleted]]

Dear Bill,

There are anova.gam methods in both the mgcv and gam packages -- perhaps you
have an older version of one of these packages.

I hope this helps,
 John

--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
-------------------------------- 
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Bill Shipley
> Sent: Friday, April 08, 2005 8:31 AM
> To: R help list
> Subject: [R] anova with gam?
> 
> Hello. In SPLUS I am used to comparing nested models in gam 
> using the anova function.  When I tried this in R this 
> doesn't work (the error message says that anova() doesn't 
> recognise the gam fit).  What must I do to use anova with 
> gam?  To be clear, I want to do the following:
> 
> fFit1<-gam(y~x,.)
> 
> fit1<-fam(y~s(x),.)
> 
>  
> 
> anova(fit2,fit1,test="F")
> 
>  
> 
> Thanks.
> 
>  
> 
> Bill Shipley
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
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