Displaying 4 results from an estimated 4 matches for "aic2".
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aic
2011 Sep 15
1
p-value for non linear model
...ectY1.
I seek first what model is best suited for my vectors and
then I want to know if my result is significant.
I'am doing like this:
model1 <- lm(vectY1 ~ vectX1, data= d),
model2 <- nls(vectY1 ~ a*(1-exp(-vectX1/b)) + c, data= d,
start = list(a=1, b=3, c=0))
aic1 <- AIC(model1)
aic2 <- AIC(model2)
if (aic1 < aic2) print("Model1 is better")
else print("Model2 is better")
for example aic1 < aic2 I'am doing summary(model1) and I have p-value to
know if my result is significant.
but if aic2 < aic1, so model 2, non linear is better. I'am...
2007 Dec 18
1
How can I extract the AIC score from a mixed model object produced using lmer?
...kly summarize and rank the models by AIC. When I
do logistic regression, I can easily generate this kind of list by creating
the model objects using glm, and doing:
> md <- c("md1.lr", "md2.lr", "md3.lr")
> aic <- c(md1.lr$aic, md2.lr$aic, md3.lr$aic)
> aic2 <- cbind(md, aic)
but when I try to extract the AIC score from the model object produced by
lmer I get:
> md1.lme$aic
NULL
Warning message:
In md1.lme$aic : $ operator not defined for this S4 class, returning NULL
So... How do I query the AIC value out of a mixed model object created by
lm...
2007 Aug 03
3
question about logistic models (AIC)
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2009 Apr 29
12
Una pregunta de estadística (marginalmente relacionada con R)
Hola, ¿qué tal?
Tengo una pregunta de esta