HierAFS {daewr}R Documentation

RSM forward regression keeping model hierarchy

Description

This function performs a hierarchical forward stepwise regression. If an interaction or quadratic term is entered in the model, the parent main effects are also entered into the model.

Usage

HierAFS(y,x,m,c,step) 

Arguments

y

input - this is a vector containing a single numeric column of response data.

x

input - this is a data frame containing the numeric columns of the candidate independent variables. The m three-level factors always preceed the c two-level factors in the design. The factor names or colnames(x) should always be of length (for example letters of the alphabet "A", "B", etc.)

m

input - this is an integer equal to the number of three-level factors in the design

c

input - this is an integer equal to the number of two-level factors in the design. Note m+c must be equal to the number of columns of des.

step

input - this is a single numeric value containing the n umber of steps requested.

Value

returned data frame the first column is a factor variable containing the formula for the model fit at each step, the second numeric column is the R-square statistic for the model fit with each formula.

Author(s)

Gerhard Krennrich, and modified by John Lawson


[Package daewr version 1.2-11 Index]