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annotate DL/Majorization Minimization DL/softthreshold.m @ 243:1fbd28dfb99e unlocbox

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setup file
author bmailhe
date Wed, 29 Aug 2012 10:39:14 +0100
parents b14209313ba4
children
rev   line source
ivan@155 1 % Soft threshold operator for matrices
ivan@155 2 % [Y] = softthreshold(X,theta)
ivan@155 3 % X : input matrix
ivan@155 4 % theta : thresholding parameter
ivan@155 5 function [Y] = softthreshold(X,theta)
ivan@155 6 Y = X - min(theta,abs(X)).*sign(X);