contr.simplex: Orthonormal Contrast Generator
Description
Generates orthonormal (orthogonal and normalized) contrasts. Each row is the vertex of an N-dimensional simplex. The only exception are contrasts for the 2-level case, which return 1 and -1.
Usage
contr.simplex(n, size = NULL)
Value
A matrix of Orthonormal contrasts.
Arguments
- n
The number of levels in the catagorical variable. If this is a factor or character vector, `n` will be `length(n)`
- size
Default `1`. The length of the simplex vector.