www.gusucode.com > wavelet工具箱matlab源码程序 > wavelet/wavelet/@laurpoly/reflect.m
function Q = reflect(P) %REFLECT Reflection for a Laurent polynomial. % Q = REFLECT(P) returns the Laurent polynomial Q obtained by % a reflection on the Laurent polynomial P: Q(z) = P(1/z). % % See also DYADDOWN, DYADUP, MODULATE, NEWVAR. % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 21-Mar-2001. % Last Revision: 13-Jun-2003. % Copyright 1995-2004 The MathWorks, Inc. Q = newvar(P,'1/z');