varFunc Object Coefficients

DESCRIPTION:

This method function extracts the coefficients associated with the variance function structure represented by object.

USAGE:

coef(object, unconstrained, allCoef) 
coef(object) <- value 

REQUIRED ARGUMENTS:

object
an object inheriting from class varFunc representing a variance function structure.

OPTIONAL ARGUMENTS:

unconstrained
a logical value. If TRUE the coefficients are returned in unconstrained form (the same used in the optimization algorithm). If FALSE the coefficients are returned in "natural", generally constrained form. Defaults to TRUE.
allCoef
a logical value. If FALSE only the coefficients which may vary during the optimization are returned. If TRUE all coefficients are returned. Defaults to FALSE.
value
a vector with the replacement values for the coefficients associated with object. It must be have the same length of `coef{object}' and must be given in unconstrained form. Object must be initialized before new values can be assigned to its coefficients.

VALUE:

a vector with the coefficients corresponding to object.

SIDE EFFECTS::

On the left side of an assignment, sets the values of the coefficients of object to value.

SEE ALSO:

EXAMPLES:

vf1 <- varPower(1) 
coef(vf1) 
coef(vf1) <- 2