www.gusucode.com > wavelet工具箱matlab源码程序 > wavelet/wavedemo/@edwttree/merge.m
function x = merge(t,node,tnd) %MERGE Merge (recompose) the data of a node. % X = MERGE(T,N,TNDATA) recomposes the data X % associated to the node N of the data tree T, % using the data associated to the children of N. % % TNDATA is a cell array (ORDER x 1) or (1 x ORDER) % such that TNDATA{k} contains the data associated to % the k-th child of N. % % The method uses IDWT. % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 09-Sep-1999. % Last Revision: 23-May-2003. % Copyright 1995-2004 The MathWorks, Inc. order = treeord(t); s = nodesize(t,node); Lo_R = t.waveInfo.Lo_R; Hi_R = t.waveInfo.Hi_R; mode = t.dwtMode; x = 0.5*(idwt(tnd{1},tnd{2},Lo_R,Hi_R,max(s),'mode',mode,'shift',0)+ ... idwt(tnd{4},tnd{3},Lo_R,Hi_R,max(s),'mode',mode,'shift',1));