coef.pdCompSymm {nlme} | R Documentation |
This method function extracts the coefficients associated with the
positive-definite matrix represented by object
.
coef(object, unconstrained, ...) coef(object) <- value
object |
an object inheriting from class pdCompSymm ,
representing a positive-definite matrix with compound symmetry
structure. |
unconstrained |
a logical value. If TRUE the coefficients
are returned in unconstrained form (the same used in the optimization
algorithm). If FALSE the standard deviation and the
correlation coefficient of the compound symmetry of
positive-definite matrix represented by object are
returned. Defaults to TRUE . |
value |
a vector with the replacement values for the coefficients
associated with object . It must be a vector of length two
and must be given in unconstrained form.
|
... |
some methods for this generic require additional arguments. None are used in this method. |
a vector with the coefficients corresponding to object
.
On the left side of an assignment, sets the values of the coefficients
of object
to value
. Object
must be initialized (using
Initialize
) before new values can be assigned to its
coefficients.
Jose Pinheiro and Douglas Bates
coef(pdCompSymm(diag(3)), FALSE)