qualityTools (version 1.31.1)

identity-methods: Get method

Description

Calculates the alias table for a fractional factorial design and prints an easy to read summary of the defining relations such as 'I = ABCD' for a standard 2^(4-1) factorial design.

Usage

## S3 method for class 'facDesign':
identity(x)

Arguments

x

a `facDesign' object

Value

• identity in character representation
  columns

See Also

aliasTable, fracDesign, fracChoose

Examples

#generate a 2^(4-1) factorial design by assigning the interaction ABC to the factor D
vp = fracDesign(k = 4, gen = "D = ABC")

#the defining relation is (D = ABC)*D = I = ABCD. I is the identity.
identity(vp)

#the identity can be seen in the according alias table
aliasTable(vp)