utilitiesV: Internal utility functions for generating regular fractional factorials

Description

~~ Internal functions, mainly for generating designs without relying on a catalogue of designs ~~

Usage

revdigits(obj, ndigits = 1 + floor(log2(max(obj))))
indexcalc(obj, k = 1 + floor(log2(max(obj))))
gencalc(gen)
YatesFly(walshindex, k=NULL)

Arguments

obj

non-negative integer (vector) with Yates matrix column numbers (called Walsh indices by Sanchez and Sanchez 2005)

ndigits

number of binary digits; default is the necessary number for the largest element of obj

number of base factors; default is the minimum necessary number for the maximum of obj

gen

generators in any admissible format (gen.check transforms any admissible format to the default needed for calculations))

walshindex

non-negative integer (vector) with Yates matrix column numbers (called Walsh indices by Sanchez and Sanchez 2005; must contain the base column numbers 1, 2, 4, 8 and so forth for the desired dimension; if this rule is violated, the first non-base column(s) are omitted in favor of supplementing the set of base columns)

Value

revdigits creates a matrix with 0-1 entries in an order appropriate for creating character generators from Yates matrix column numbers, indexcalc calculates a named list of vectors of base column numbers, named by the corresponding character generator, gencalc calculates Yates column numbers from arbitrary types of generator representations (except for negative numbers), YatesFly produces an experimental plan from a vector of Yates column numbers which have to include the base column numbers (contrary to the generators option in FrF2 or FrF2Large

Details

These internal functions are used for generating regular 2-level fractional factorials. The Sanchez and Sanchez (2005) way of providing large resolution V designs is supported, as well as manual design generation of large designs with functions FrF2 and FrF2Large.

References