hthr = 2logn^05; eta = sumabsx^2-n1n; crit = lognlog2^15n^05; thr = thselectxrigrsure; thrthr hthr = hthr; threta crit = hthr;对上述代码的阈值函数改为wjk=sgnwjk-pλ1+eqwjk-λwjk

更改后的代码如下：

hthr = (2*log(n)).^0.5; eta = sum(abs(x).^2-n,1)./n; crit = (log(n)/log(2))^(1.5)/(n.^0.5);

% 计算新的阈值 lambda = 0.5; % 设定lambda的值 wj = x; % 初始化wj for i = 1:size(x,2) % 遍历每个列向量 wj(:,i) = sgn(wj(:,i)-lambda) .* max(abs(wj(:,i))-lambda,0); end

thr = wj; thr(thr > hthr) = hthr; thr(eta < crit) = hthr;