def bohman(M, sym=True):
 if _len_guards(M):
  return np.ones(M)
 (M, needs_trunc) = _extend(M, sym)
 fac = np.abs(np.linspace((-1), 1, M)[1:(-1)])
 w = (((1 - fac) * np.cos((np.pi * fac))) + ((1.0 / np.pi) * np.sin((np.pi * fac))))
 w = np.r_[(0, w, 0)]
 return _truncate(w, needs_trunc)

def bohman ( M , sym = True ) : if _len_guards ( M ) : return np . ones ( M ) ( M , needs_trunc ) = _extend ( M , sym ) fac = np . abs ( np . linspace ( ( - 1 ) , 1 , M ) [ 1 : ( - 1 ) ] ) w = ( ( ( 1 - fac ) * np . cos ( ( np . pi * fac ) ) ) + ( ( 1.0 / np . pi ) * np . sin ( ( np . pi * fac ) ) ) ) w = np . r_ [ ( 0 , w , 0 ) ] return _truncate ( w , needs_trunc )
return a bohman window .