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annotate DL/Majorization Minimization DL/softthreshold.m @ 204:5fe60504a6a9 luisf_dev

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Merge from 203:f3b6ddd2f04f
author luisf <luis.figueira@eecs.qmul.ac.uk>
date Tue, 20 Mar 2012 15:53:15 +0000
parents b14209313ba4
children
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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);