load gatlin2
t = wpdec2(X,1,'haar');
figure(1);
plot(t);
%在運(yùn)行上面命令后出現(xiàn)的圖形主菜單中將Node Label從Depth-postion切換到
%Index并單擊索引值為0的結(jié)點(diǎn)，即根結(jié)點(diǎn)，顯示如圖4-7
%改變四個(gè)終結(jié)點(diǎn)
newt = t;
NBcols = 40;
for node = 1:4
cfs = read(t,'data',node);
tmp = cfs(1:end,1:NBcols);
cfs(1:end,1:NBcols) = cfs(1:end,end-NBcols+1:end);
cfs(1:end,end-NBcols+1:end) = tmp;
newt = write(newt,'data',node,cfs);
end
figure(2);
plot(newt)
%在上面命令運(yùn)行后出現(xiàn)的窗口主菜單中再將Node Label從Depth-postion切換到
%Index并單擊索引值為0的結(jié)點(diǎn)，即根結(jié)點(diǎn)，如圖4-8所示
%可以看出，圖4-7和圖4-8的圖像正好左右對(duì)稱，這是因?yàn)槲覀兺ㄟ^(guò)read和write
%將四個(gè)終結(jié)點(diǎn)的系數(shù)左右對(duì)調(diào)的原因