CompExpDes (version 1.0.7)

UDesigns_I: Orthogonal Uniform Designs with Two Factors

Description

This series of UDs can be obtained for a composite number of levels, L with always two factors, F. Further, "Excellent" type UDs are Excellent in space-filling with larger number of runs available for L >= 6. On the other hand, "Good" type UDs are good in space-filling and lesser the number of runs, available for L >= 9. Generated designs are UDs under discrete discrepancy measure, as all designs will attain the lower bound value of discrete discrepancy.

Usage

UDesigns_I(levels, type)

Value

Returns a uniform designs along with number of factors, levels, runs, maximum absolute correlation (MAC) value and discrete discrepancy measure along with its lower bound value.

Arguments

levels

Any composite number >=6 (if "Excellent") or >=9 (if "Good")

type

"Excellent" or "Good"

Author

Ashutosh Dalal, Cini Varghese, Rajender Parsad and Mohd Harun

Details

Type "Excellent" or type "Good" both can exist for a same parameter range. For type "Excellent" it will require more runs than designs generated by type "Good". But type "Excellent" provides designs which are having more spread than type "Good" series designs.

References

Fang, K.T. (1980). The uniform design: application of number-theoretic methods in experimental design. Acta Math Appl Sin, 3, 363-372.

Examples

library(CompExpDes)
UDesigns_I(levels=6, type="Excellent")