cdn_cooper {HadamardR}

cdn_cooper

Description

Checks Hadamard Matrix can be constructed using Williamson arrays and T- sequences.

Usage

cdn_cooper(order)

Arguments

order

integer

Details

Cooper-Wallis is a construction of Hadamard matrices which combines Williamson matrices and T-sequences.

The availabile Williamson sequences in the internal data sets is seq(1,63, 2) except 15, 35, 47, 53, 59 in the internal table.

The availabile T- sequences in the internal data sets is seq(1,73,2) and 83, 101, 107.

Value

11 or NULL

References

Cooper, J., and Wallis, W., D. (1972). A construction for Hadamard arrays. Bull. Austral. Math. 7, 269-278.

See Also

had_cooper for Cooper-Wallis construction method. get_cooper for finding order of Williamson and T-Sequences.

Examples

cdn_cooper(20)
#11
cdn_cooper(16)
#NULL