match.formula(F1, F2)
F1
. A
value of
NA
is returned if there are terms or variables in
F2
that do not
appear in
F1
. The returned value has a attribute
order
that
indicates the order of occurence in
F1
of the common terms.
This is a utility for
update.fac.aov
.
match.formula(~ pH*thimer*gent,~ thimer + pH + pH:thimer) match.formula(~ thimer + pH,~ pH*thimer) match.formula(rate ~ thimer * pH,sqrt(rate) ~ pH*thimer)