IS-NMF/MU算法matlab代码

以下是IS-NMF/MU算法的MATLAB代码：

function [W,H] = isnmf(V,r,lamda,maxiter)
% Inputs:
% V: input matrix
% r: number of basis vectors
% lamda: regularization parameter
% maxiter: maximum number of iterations
% Outputs:
% W: basis matrix
% H: activation matrix

% initialize W and H
[m,n] = size(V);
W = rand(m,r);
H = rand(r,n);

% iterate until convergence or maxiter reached
for i = 1:maxiter
    % update H
    numerator = W'*(V.*(W*H+lamda))./(W'*(W*H+2*lamda));
    denominator = ones(r,n) + lamda./max(W'*W*H,eps);
    H = H.*numerator./denominator;
    % update W
    numerator = (V.*(W*H+lamda))*H';
    denominator = max(W*(H*H')+lamda,eps);
    W = W.*numerator./denominator;
end
end

这是IS-NMF/MU算法的基本实现，其中lamda是正则化参数，maxiter是最大迭代次数。详细的算法说明和公式可以参考相关的文献。