R help - Apr 2008 - AIC extract and comparison

Hi, I need to fit models and use AIC method to campare the best fitted model
manually.

When i extract AIC by using extractAIC, it gave me the df and AIC values.
Now the problem is, how can I compare the AIC values from two models?
is there anyway to extract AIC with no df so that I can compare directly?
Thank you!
> extractAIC(coxout)
[1]    1.000 1723.038

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Lisa wrote:
> Hi, I need to fit models and use AIC method to campare the best fitted
model
> manually.
> 
> When i extract AIC by using extractAIC, it gave me the df and AIC values.
> Now the problem is, how can I compare the AIC values from two models?
> is there anyway to extract AIC with no df so that I can compare directly?
> Thank you!
> 
>> extractAIC(coxout)
> [1]    1.000 1723.038
extractAIC(coxout)[2]

Uwe


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