R help - Jul 2009 - How to perform a Likelihood-ratio test?

Hi.

 

I would like to use a likelihood-ratio test to compare a linear model (lm()) to
another linear model containing the first one to see if the extra factors are
needed - but I was unable to find any help on how to do that.

Could you help me and tell me what to do? Or tell me where to find help on this
topic?

 

Many thanks in advance!

 

Lars

_________________________________________________________________

s. It's easy!

aspx&mkt=en-us
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Hi Lars,

Using the definition of Likelihood-ratio test is straightforward, 

Jeff

Lars Bergemann wrote:
> 
> 
> Hi.
> 
>  
> 
> I would like to use a likelihood-ratio test to compare a linear model
> (lm()) to another linear model containing the first one to see if the
> extra factors are needed - but I was unable to find any help on how to do
> that.
> 
> Could you help me and tell me what to do? Or tell me where to find help on
> this topic?
> 
>  
> 
> Many thanks in advance!
> 
>  
> 
> Lars
> 
> _________________________________________________________________
> 
> s. It's easy!
> 
> aspx&mkt=en-us
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 
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Le lundi 13 juillet 2009 ? 13:04 +0200, Lars Bergemann a ?crit
:
> Hi.
> 
>  
> 
> I would like to use a likelihood-ratio test to compare a linear model
(lm()) to another linear model containing the first one to see if the extra
factors are needed - but I was unable to find any help on how to do that.
> 
> Could you help me and tell me what to do? Or tell me where to find help on
this topic?
?anova? Check the "test" argument ...:-)

					Emmanuel Charpentier

Dear Lars,
One way would be

anova(model1, model2)

See ?anova for more information.

HTH,

Jorge



On Mon, Jul 13, 2009 at 7:04 AM, Lars Bergemann
<lars.bergemann@hotmail.com>wrote:
>
> Hi.
>
>
>
> I would like to use a likelihood-ratio test to compare a linear model
> (lm()) to another linear model containing the first one to see if the extra
> factors are needed - but I was unable to find any help on how to do that.
>
> Could you help me and tell me what to do? Or tell me where to find help on
> this topic?
>
>
>
> Many thanks in advance!
>
>
>
> Lars
>
> _________________________________________________________________
>
> s. It's easy!
>
> aspx&mkt=en-us
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]