Modify terms objects
Usage
delete.response(termobj)
reformulate(termlabels,response=NULL)
drop.terms(termobj, dropx = NULL, keep.response = FALSE)
Arguments
termobj
|
A terms object
|
termlabels
|
vector of strings giving the right-hand side of a model formula
|
response
|
string giving the left-hand side of a model formula
|
dropx
|
vector of positions of variables to drop from the right-hand side of the model
|
keep.response
|
Keep the response in the resulting object?
|
Description
delete.response
returns a terms
object for the same model but with no response variable. drop.terms
removes variables from the right-hand side of the model. reformulate
creates a formula from a vector of strings.Value
delete.response
and drop.terms
return a terms
object; reformulate
returns a formula
.See Also
terms
Examples
ff<-y~z+x+w
tt<-terms(ff)
tt
delete.response(tt)
drop.terms(tt,2:3,keep.response=T)
reformulate(attr(tt,"term.labels"))