firstm: Find first term to enter forward stepwise regression that...

In daewr: Design and Analysis of Experiments with R

Find first term to enter forward stepwise regression that preserves model hierarchy

Description

This function finds the first term to enter a hierarchical forward stepwise regression. If the term is an interaction or quadratic term, the parent main effects are also included. This function is called by ihstep.R

Usage

firstm(y,des)

Arguments

y	input - this is a data frame containing a single numeric column of response data.
des	input - this is a data frame containing the numeric columns of the candidate independent variables. The column names of des are of length 1. The m three-level factors always preceed the c two-level factors in the design.

Value

returned vector of terms to be entered in the model at the first step.

Author(s)

John Lawson

daewr documentation built on Sept. 9, 2023, 9:06 a.m.