www.gusucode.com > wavelet工具箱matlab源码程序 > wavelet/wavelet/@ntree/private/descendants.m
function tab = descendants(t,node,type,flagdp) %DESCENDANTS Construction of descendants table. % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 21-May-2003. % Last Revision: 22-May-2003. % Copyright 1995-2004 The MathWorks, Inc. order = treeord(t); depth = treedpth(t); tn = leaves(t); node = depo2ind(order,node); % Construction of ascendants table. %---------------------------------- tab = zeros(length(tn),depth+1); tab(:,1) = tn; for j = 1:depth tab(:,j+1) = floor((tab(:,j)-1)/order); end % Find descendants. %------------------ [row,col] = find(tab==node); switch type case 'all' , first = 1; case 'not_tn' , first = 2; row = row(col>2); end last = max(col)-1; tab = tab(row,first:last); tab = tab(:); tab = tab(tab>node); tab = [node ; wunique(tab)]; if nargin==4 && flagdp [tab(:,1),tab(:,2)] = ind2depo(order,tab); end