A
structName attribute, with the value of corresponding
argument, is appended to
object and its class is changed to
summary.varFunc
.
USAGE:
summary(object, structName)
REQUIRED ARGUMENTS:
object
an object inheriting from class
varFunc,
representing a variance function structure.
OPTIONAL ARGUMENTS:
structName
an optional character string with a description of
the
varFunc class. Default depends on the method function:
"Combination of variance functions" for
varComb,
"Constant plus power of covariate" for
varConstPower,
"Exponential of variance covariate" for
varExp,
"Different standard deviations per stratum" for
varIdent,
"Power of variance covariate" for
varPower, and
data.class(object) for
varFunc.
VALUE:
an object similar to
object, with an additional attribute
structName
, inheriting from class
summary.varFunc.