dae (version 3.2.21)

mpone: Converts the first two levels of a factor into the numeric values -1 and +1

Description

Converts the first two levels of a factor into the numeric values -1 and +1.

Usage

mpone(factor)

Value

A numeric vector.

Arguments

factor

The factor to be converted.

Warning

If the factor has more than two levels they will be coerced to numeric values.

Author

Chris Brien

See Also

mpone in package dae, factor, relevel.

Examples

## generate all combinations of two two-level factors
mp <- c("-", "+")
Frf3.trt <- fac.gen(list(A = mp, B = mp))

## add factor C, whose levels are the products of the levles of A and B
Frf3.trt$C <- factor(mpone(Frf3.trt$A)*mpone(Frf3.trt$B), labels = mp)