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\begin{verbatim}  load ex3_data.mat  %% MNE  L2=L*L';  snr = sqrt(n_trial);  lambda = trace(L2)/(trace(Cn)*snr^2)  p_mne=L'*pinv(L2+lambda*Cn,1e-24); trace(L2)/(trace(Cn)*snr^2);  ev = eigs(L2+lambda*Cn, rank(data1));  tol = ev(end)  p_mne=L'*pinv(L2+lambda*Cn, tol);  src1 = p_mne*data1;  src2 = p_mne*data2;