spyrit.core.torch.walsh_matrix

spyrit.core.torch.walsh_matrix(n)

Returns a 1D Walsh-ordered Hadamard transform matrix of size \(n \times n\).

Args:

n (int): Order of the Hadamard matrix. Must be a power of two.

Raises:

ValueError: If n is not a positive integer or if n is not a power of 2.

Returns:

torch.tensor: A n-by-n matrix representing the Walsh-ordered Hadamard matrix.