| factor.scope | R Documentation |
add.scope and drop.scope compute those terms that can be
individually added to or dropped from a model while respecting the
hierarchy of terms.
add.scope(terms1, terms2) drop.scope(terms1, terms2) factor.scope(factor, scope)
terms1 |
the terms or formula for the base model. |
terms2 |
the terms or formula for the upper ( |
factor |
the |
scope |
a list with one or both components |
factor.scope is not intended to be called directly by users.
For add.scope and drop.scope a character vector of
terms labels. For factor.scope, a list with components
drop and add, character vectors of terms labels.
add1, drop1,
aov, lm
add.scope( ~ a + b + c + a:b, ~ (a + b + c)^3) # [1] "a:c" "b:c" drop.scope( ~ a + b + c + a:b) # [1] "c" "a:b"
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