fwht

Calculates the Fast Walsh-Hadamard transform of the inputed vector X.Second argument must be a power of 2 number. Third argument options:'seq' - Coefficients in order of increasing sequency;'had' - Coefficients in normal Hadamard order.

Arguments

1. Input vector
2. Positive integer value n, a power of 2 number
3. String value - 'seq', 'had'

Output

Result vector

Examples