ngrps {lme4} | R Documentation |
Returns the number of levels of a factor
or a set of
factors, currently e.g., for each of the grouping factors of
lmer()
, glmer()
, etc.
ngrps(object, ...)
object |
an |
... |
currently ignored. |
Currently there are methods for objects of class
merMod
, i.e., the result of lmer()
etc,
and factor
objects.
The number of levels (of a factor) or vector of number of levels for each “grouping factor” of a
ngrps(factor(seq(1,10,2))) ngrps(lmer(Reaction ~ 1|Subject, sleepstudy)) ## A named vector if there's more than one grouping factor : ngrps(lmer(strength ~ (1|batch/cask), Pastes)) ## cask:batch batch ## 30 10 methods(ngrps) # -> "factor" and "merMod"