nlme (version 3.1-166)

summary.varFunc: Summarize "varFunc" Object

Description

A structName attribute, with the value of corresponding argument, is appended to object and its class is changed to summary.varFunc.

Usage

# S3 method for varFunc
summary(object, structName, ...)

Value

an object similar to object, with an additional attribute

structName, inheriting from class summary.varFunc.

Arguments

object

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

structName

an optional character string with a description of the varFunc class. Default depends on the method function:

for varComb:

"Combination of variance functions",

for varConstPower:

"Constant plus power of variance covariate",

for varConstProp:

"Constant plus proportion of variance covariate",

for varExp:

"Exponential of variance covariate",

for varIdent:

"Different standard deviations per stratum",

for varPower:

"Power of variance covariate",

for varFunc:

data.class(object).

...

some methods for this generic require additional arguments. None are used in this method.

Author

José Pinheiro and Douglas Bates

See Also

varClasses, varFunc

Examples

vf1 <- varPower(0.3, form = ~age)
vf1 <- Initialize(vf1, Orthodont)
summary(vf1)