Extract components from a model frame
Usage
model.extract(frame, component)
model.offset(frame)
model.response(frame)
Arguments
frame
|
A model frame
|
component
|
The name of a components to extract, such as "weights" , "subset"
|
Description
Returns the response, offset, subset, weights or other special components of a model frame passed as optional arguments to model.frame
. model.offset
and model.response
are equivalent to model.frame(,"offset")
and model.frame(,"response")
respectively.Value
The specified component of the model frame, usually a vector.See Also
model.frame
, offset
Examples
data(esoph)
a<-model.frame(cbind(ncases,ncontrols)~agegp+tobgp+alcgp,data=esoph)
model.extract(a,"response")
model.response(a)
a<-model.frame(ncases/(ncases+ncontrols)~agegp+tobgp+alcgp,data=esoph,weights=ncases+ncontrols)
model.response(a)
model.extract(a,"weights")
a<-model.frame(cbind(ncases,ncontrols)~agegp,something=tobgp,data=esoph)
names(a)
all(model.extract(a,"something")==esoph$tobgp)