ref: 6a0181f59f816326f52db1775cb0c2ab4ef1758d
dir: /generate_filter.m/
function f = generate_filter (cycles, fudge_factor, increment, atten) if nargin != 4, error ("Need four args.") ; endif # Calclate N and make sure it is odd. N = fix (4 * cycles * fudge_factor * increment) ; if rem (N, 2) != 1, N = N - 1 ; endif # Generate the Sinc function. m = -((N-1)/2):((N-1)/2) ; f = sinc (m / fudge_factor / increment) ; # Genertate the window function and apply it. w = kaiser (N, (atten + 0.5) / 10) ; w = w' ; f = f .* w ; f = f / sum (f) ; endfunction # Do not edit or modify anything in this comment block. # The arch-tag line is a file identity tag for the GNU Arch # revision control system. # # arch-tag: 7e57a3cb-3f5c-4346-bfcd-4da1e758e2a7