Given the name (a term label) of a term in a model, identify if the term is a
factor term or numeric. This is useful when considering interactions, where
terms like fac1:fac2 or num1:fac1 may be requested by the user. Only for
terms of the type fac1:fac2 will this function return TRUE.
is_factor_term(object, term, ...)# S3 method for terms
is_factor_term(object, term, ...)
# S3 method for gam
is_factor_term(object, term, ...)
# S3 method for bam
is_factor_term(object, term, ...)
# S3 method for gamm
is_factor_term(object, term, ...)
# S3 method for list
is_factor_term(object, term, ...)
A logical: TRUE if and only if all variables involved in the term
are factors, otherwise FALSE.
an R object on which method dispatch is performed
character; the name of a model term, in the sense of
attr(terms(object), "term.labels"). Currently not checked to see if the
term exists in the model.
arguments passed to other methods.