mgcv: FFdes – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

FFdes

Level 5 fractional factorial designs

Description

Computes level 5 fractional factorial designs for up to 120 factors using the agorithm of Sanchez and Sanchez (2005), and optionally central composite designs.

Usage

FFdes(size=5,ccd=FALSE)

Arguments

`size`	number of factors up to 120.
`ccd`	if `TRUE`, adds points along each axis at the same distance from the origin as the points in the fractional factorial design, to create the outer points of a central composite design. Add central points to complete.

Details

Basically a translation of the code provided in the appendix of Sanchez and Sanchez (2005).

Author(s)

Simon N. Wood simon.wood@r-project.org

References

Sanchez, S. M. & Sanchez, P. J. (2005) Very large fractional factorial and central composite designs. ACM Transactions on Modeling and Computer Simulation. 15: 362-377

Examples

require(mgcv)
  plot(rbind(0,FFdes(2,TRUE)),xlab="x",ylab="y",
       col=c(2,1,1,1,1,4,4,4,4),pch=19,main="CCD")
  FFdes(5)
  FFdes(5,TRUE)

mgcv

Mixed GAM Computation Vehicle with Automatic Smoothness Estimation

v1.8-35

GPL (>= 2)

Authors

Simon Wood <simon.wood@r-project.org>

Initial release