www.gusucode.com > wavelet工具箱matlab源码程序 > wavelet/wavelet/meyeraux.m
function y = meyeraux(x); %MEYERAUX Meyer wavelet auxiliary function. % Y = MEYERAUX(X) returns values of the auxiliary % function used for Meyer wavelet generation evaluated % at the elements of the vector or matrix X. % % The function is 35*x^4 - 84*x^5 + 70*x^6 - 20*x^7. % % See also MEYER. % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 12-Mar-96. % Last Revision: 14-May-2003. % Copyright 1995-2004 The MathWorks, Inc. % Auxiliary function values. p = [-20 70 -84 35 0 0 0 0]; y = polyval(p,x);