formula.pdBlocked {nlme} | R Documentation |
The 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.
formula(object, asList)
object |
an object inheriting from class 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 . |
a list of one-sided formulas, or a single one-sided formula, or
NULL
.
Jose Pinheiro and Douglas Bates
pd1 <- pdBlocked(list(~ age, ~ Sex - 1)) formula(pd1) formula(pd1, asList = TRUE)