MuMIn
contains functions for (automated) model selection and
model averaging based on information criteria (AIC alike).AIC
, step
fm1 <- lm(Fertility ~ . , data = swiss)
dd <- dredge(fm1)
top.models.1 <- get.models(dd, subset = delta < 4)
model.avg(top.models.1) # get averaged coefficients
top.models.2 <- get.models(dd, cumsum(weight) <= .95)
model.avg(top.models.2)
# Mixed models:
# modified example(lme)
data(Orthodont, package="nlme")
require(nlme)
fm2 <- lme(distance ~ age + Sex, data = Orthodont,
random = ~ 1 | Subject, method="ML")
dredge(fm2)
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