opt_rotation: Finds an Optimal Rotation Vector

In vinny-paris/TripleFrac: Triple Fold Designs

Description

This function will produce an optimal rotation vector for some design. It will produce Resolution IV if possible and if not will find a minimal aberration. If multiple minimal aberration designs exist it will randomly choose one and ignore any "desirability" between factors.

Usage

opt_rotation(design)

Arguments

design

This needs to be a coded design matrix using (0,1,2) where each row corresponds to one treatment.

Value

It will produce a list

Rotation Vector	The first element of the list will be the optimum rotation vector and a small message whether Resoluiton IV is obtainable or if this is minimal abberration
psuedo-design matrix	This is the fake design matrix which is the coded effects of length 3 that are aliased with the intercept in the original design. This will not neccessarly be a regular fractional factorial design (hence psuedo)

Examples

x <- c("a", "b", "c", "d", "e", "f")
l <- matrix(c(1,2,0,1,1,1, 0,1,1,2,0,0, 1,1,1,2,2,0), nrow = 3, byrow = TRUE)
trees <- c(0,0,0)
m <- TripleFrac:::part(x, l, trees)[[1]]
head(m)
what_frac(m)
opt_rotation(m)

vinny-paris/TripleFrac documentation built on May 10, 2019, 8:27 a.m.