Vdgraph (version 2.2-2)

Compare2FDS: This function compares Fraction of Design Space Plots for two response surface designs.

Description

This function compares Fraction of Design Space Plots for two response surface designs with the same number of factors over the unit hypercube design space.

Usage

Compare2FDS(des1, des2, name1, name2, mod=2)

Arguments

des1

des1 is a matrix or a data frame containing the first response surface design to be compared in coded or uncoded units. There should be one column for each factor in the design, and one row for each run in the design. The maximum number of rows allowed is 99, and the maximum number of columns is 7.

des2

des2 is a matrix or a data frame containing the second response surface design to be compared in coded or uncoded units. There should be one column for each factor in the design, and one row for each run in the design. The maximum number of rows allowed is 99, and the maximum number of columns is 7.

name1

name1 is a character string containing a descriptive name for the first design. This descriptive name should be no more than 40 characters in order to fit in the space for a legend. If left out name1 defaults to des1

name2

name2 is a character string containing a descriptive name for the second design. This descriptive name should be no more than 40 characters in order to fit in the space for a legend. If left out name2 defaults to des2

mod

mod is the model to be represented. 0 = linear model 1 = linear main effects plus linear by linear 2-factor interactions 2 = full quadratic response surface model (default.

References

1.Zahran, A., Anderson-Cook, C. M. and Myers,R. H. "Fraction of Design Space to Assess Prediction Capability of Response Surface Designs" Journal of Quality Technology, Vol 35, No. 4, pp 377-386. 2003.

Examples

data(SCDH5)
data(SCDDL5)
Compare2FDS(SCDH5, SCDDL5, "Hartley SCD-5", "Draper-Lin SCD5", mod=2)