contr.orthonormal {BayesTools}

Orthornomal contrast matrix

Description

Return a matrix of orthornomal contrasts. Code is based on stanova::contr.bayes and corresponding to description by Rouder et al. (2012)

Usage

contr.orthonormal(n, contrasts = TRUE)

Arguments

n

a vector of levels for a factor, or the number of levels

contrasts

logical indicating whether contrasts should be computed

Value

A matrix with n rows and k columns, with k = n - 1 if contrasts = TRUE and k = n if contrasts = FALSE.

References

Rouder JN, Morey RD, Speckman PL, Province JM (2012). “Default Bayes factors for ANOVA designs.” Journal of Mathematical Psychology, 56(5), 356–374. doi:10.1016/j.jmp.2012.08.001.

Examples

contr.orthonormal(c(1, 2))
contr.orthonormal(c(1, 2, 3))