% 當前的延拓模式是補零
% 產生高斯白噪聲
init = 2055415866; randn('seed',init); 
x = randn(1,1000);
% 尋找各個閾值選擇規則的閾值
% 使用SURE的自適應閾值
thr1 = thselect(x,'rigrsure') 
% 固定形式閾值
thr2 = thselect(x,'sqtwolog') 
% 啟發式閾值
thr3 = thselect(x,'heursure') 
% 極小極大閾值
thr4 = thselect(x,'minimaxi')