Return a matrix of orthornomal contrasts.
Code is based on stanova::contr.bayes and corresponding to description
by rouder2012default;textualBayesTools
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.
Examples
contr.orthonormal(c(1, 2))
#> [,1]
#> [1,] -0.7071068
#> [2,] 0.7071068
contr.orthonormal(c(1, 2, 3))
#> [,1] [,2]
#> [1,] 0.0000000 0.8164966
#> [2,] -0.7071068 -0.4082483
#> [3,] 0.7071068 -0.4082483