R: Hadamard matrices

hadamard {magic} | R Documentation

## Hadamard matrices

### Description

Various functionality for Hadamard matrices

### Usage

    sylvester(k)
    is.hadamard(m)

### Arguments

`k` | Function `sylvester()` gives the `k`-th Sylvester matrix
`m` | matrix

### Details

A Hadamard matrix is a square matrix whose entries are either +1 or -1 and whose rows are mutually orthogonal.

### Author(s)

Robin K. S. Hankin

### References

“Hadamard matrix.” Wikipedia, The Free Encyclopedia. 19 Jan 2009, 18:21 UTC. 20 Jan 2009

### Examples

    is.hadamard(sylvester(4))
    image(sylvester(5))

[Package magic version 1.5-8 Index]