annotate DL/Majorization Minimization DL/softthreshold.m @ 228:198d4d9cee74 luisf_dev

Now can use a local configuration file, which is a copy of the default config files, and thus not being commited to the repository.

% Soft threshold operator for matrices
% [Y] = softthreshold(X,theta)
% X : input matrix
% theta : thresholding parameter
function [Y] = softthreshold(X,theta)
Y = X - min(theta,abs(X)).*sign(X);