Description Usage Arguments Value Author(s) See Also Examples
stepComponent
is a wrapper around step
to select a
"twinstim"
component's model based on an information
criterion in a stepwise algorithm.
There are also stand-alone single-step methods of add1
and
drop1
.
1 2 3 4 5 6 7 8 9 10 | stepComponent(object, component = c("endemic", "epidemic"),
scope = list(upper = object$formula[[component]]),
direction = "both", trace = 2, verbose = FALSE, ...)
## S3 method for class 'twinstim'
add1(object, scope, component = c("endemic", "epidemic"),
trace = 2, ...)
## S3 method for class 'twinstim'
drop1(object, scope, component = c("endemic", "epidemic"),
trace = 2, ...)
|
object |
an object of class |
component |
one of |
scope,direction,trace |
see |
verbose |
see |
... |
further arguments passed to |
See step
and add1
, respectively.
(of this wrapper around step
) Sebastian Meyer
1 2 3 4 5 6 7 8 9 | data("imdepi")
data("imdepifit")
## simple baseline model
m0 <- update(imdepifit, epidemic=~1, siaf=NULL, start=c("e.(Intercept)"=-17))
## AIC-based step-wise backward selection of the endemic component
m0_step <- stepComponent(m0, "endemic", scope=list(lower=~I(start/365-3.5)))
## nothing is dropped from the model
|
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