Summarize "varFunc" Object

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

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

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.

Value

an object similar to object, with an additional attribute structName, inheriting from class summary.varFunc.

Author

José Pinheiro and Douglas Bates bates@stat.wisc.edu

See also

varClasses, varFunc

Examples

vf1 <- varPower(0.3, form = ~age)
vf1 <- Initialize(vf1, Orthodont)
summary(vf1)
#> Variance function:
#>  Structure: Power of variance covariate
#>  Formula: ~age 
#>  Parameter estimates:
#> power 
#>   0.3