formula(object, asList)
object
| an object inheriting from class code{pdBlocked}, representing a positive definite block diagonal matrix. |
asList
|
an optional logical value. If TRUE , a list with
the formulas for the individual block diagonal elements of
object is returned; else, if FALSE , a one-sided formula
combining all individual formulas is returned. Defaults to
FALSE .
|
formula
attributes of the pdMat
elements of
object
are extracted and returned as a list, in case
asList=TRUE
, or converted to a single one-sided formula when
asList=FALSE
. If the pdMat
elements do not have a
formula
attribute, a NULL
value is returned.NULL
.pdBlocked
, pdMat
library(lme) pd1 <- pdBlocked(list(~ age, ~ Sex - 1)) formula(pd1) formula(pd1, asList = TRUE)