rs2 {gnlm}R Documentation

Two-factor Box-Tidwell Nonlinear Response Surface Models

Description

rs2 fits a two-covariate power-transformed response surface by iterating the function, glm.

Usage

rs2(y, x1, x2, power=c(1,1), weight=rep(1,length(y)), family=normal,
        iterlim=20)

Arguments

y Response variable
x1 First covariate
x2 Second covariate
power Initial estimates of the two power transformations
weight Weight vector
family glm family
iterlim Iteration limit

Value

A list of class, rs, is returned containing the model and the power estimates.

Author(s)

J.K. Lindsey

See Also

lm, glm, gnlr, gnlr3, rs3

Examples

x1 <- rep(1:4,5)
x2 <- rep(1:5,rep(4,5))
y <- rpois(20,1+2*sqrt(x1)+3*log(x2)+4*x1+log(x2)^2+2*sqrt(x1)*log(x2))
rs2(y, x1, x2, family=poisson)

[Package gnlm version 1.0 Index]