Create a Hadamard Design

This method returns unique designs according to a Hadamard matrix. For debugging, you can use set.seed to be assured of deterministic output.

Usage

hadamardExperimentalDesign(X, strict = TRUE, form = "one_zero")

Arguments

X

The design matrix with $n$ rows (one for each subject) and $p$ columns (one for each measurement on the subject). The measurements aren't used to compute the Hadamard designs, only the number of rows.

strict

Hadamard matrices are not available for all $n$.

form

Which form should it be in? The default is one_zero for 1/0's or pos_one_min_one for +1/-1's.

Value

An matrix of dimension $R$ x $n$ where $R$ is the number of Hadamard allocations.

Author

Adam Kapelner

Examples

if (FALSE) { # \dontrun{
set.seed(1)
X = matrix(rnorm(16), nrow = 8)
W = hadamardExperimentalDesign(X, strict = TRUE, form = "one_zero")
dim(W)
} # }