RotatabilityQ {MixedLevelRSDs}

Measure of rotatability Q based on a second order model

Description

Calculates the measure of rotatability (measure Q, 0 <= Q <= 1) given by Draper and Pukelsheim(1990) for given design based on a second order model.

Usage

RotatabilityQ(design)

Arguments

design

Second order design matrix without intercept

Value

Rotatability measure Q

References

1) Norman R. Draper and Friedrich Pukelsheim(1990), <doi: 10.1080/00401706.1990.10484635>. "Another look at rotatability".

2) M. Hemavathi, Shashi Shekhar, Eldho Varghese, Seema Jaggi, Bikas Sinha & Nripes Kumar Mandal (2022)<doi: 10.1080/03610926.2021.1944213>." Theoretical developments in response surface designs: an informative review and further thoughts.".

Examples

## Not run: 
library(MixedLevelRSDs)
RotatabilityQ(design)

## End(Not run)