R: varFunc Object Coefficients

coef.varFunc {nlme}

R Documentation

varFunc Object Coefficients

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

## S3 method for class 'varFunc':
coef(object, unconstrained, allCoef, ...)
## S3 method for class 'varIdent':
coef(object, ...) <- value

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

Jose Pinheiro and Douglas Bates

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