utilities {DoE.base}R Documentation

Utility functions for DoE packages, not intended for direct use

Description

Utility functions for DoE packages, not intended for direct use

Usage

make.generators(name, liste)
make.formulas(orignames, factor.names)
des.recode(var, recodes, as.factor.result, char) 
Letters

Arguments

name ...
liste ...
orignames ...
factor.names ...
var variable
recodes character string specifying recodes, so far only used in the principal form “-1=level[1];1=level[2]”
as.factor.result logical that specifies whether or not results are to be coerced to factor. The default is that factors are coerced to factor, while numeric variables with numeric recodes are kept numeric.
char logical: should replacement be treated as character string (TRUE) or evaluated? default is FALSE

Details

The functions are not intended for direct use.

The constant Letters is the vector of all capital and lower case letters of the Roman alphabet except I and i. It is used for default factor names and has been obtained as
Letters <- c(LETTERS[-9],letters[-9]).

Value

The functions are not intended for direct use.

Note

This package is currently under intensive development. Substantial changes are to be expected in the near future.

Author(s)

Ulrike Groemping

References

Hedayat, A.S., Sloane, N.J.A. and Stufken, J. (1999) Orthogonal Arrays: Theory and Applications, Springer, New York.

See Also

See Also FrF2-package, DoE.wrapper-package

Examples

## default factor names for most design generating functions 
## (some quantitative designs have other default factor names)
## for up to 50 factors
Letters

[Package DoE.base version 0.9-14 Index]