| formula.pdBlocked {nlme} | R Documentation |
The formula attributes of the pdMat elements of
x 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.
## S3 method for class 'pdBlocked': formula(x, asList, ...)
x |
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
x is returned; else, if FALSE, a one-sided formula
combining all individual formulas is returned. Defaults to
FALSE. |
... |
some methods for this generic require additional arguments. None are used in this method. |
a list of one-sided formulas, or a single one-sided formula, or
NULL.
Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu
pd1 <- pdBlocked(list(~ age, ~ Sex - 1)) formula(pd1) formula(pd1, asList = TRUE)