varComb function

Combination of Variance Functions

This function is a constructor for the varComb class, representing a combination of variance functions. The corresponding variance function is equal to the product of the variance functions of the varFunc objects listed in ....

varComb(...)

Arguments

• ...: objects inheriting from class varFunc representing variance function structures.

Returns

a varComb object representing a combination of variance functions, also inheriting from class varFunc.

References

Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer.

Author(s)

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

See Also

varClasses, varWeights.varComb, coef.varComb

Examples

vf1 <- varComb(varIdent(form = ~1|Sex), varPower())