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diff DL/Majorization Minimization DL/softthreshold.m @ 155:b14209313ba4 ivand_dev

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Integration of Majorization Minimisation Dictionary Learning
author Ivan Damnjanovic lnx <ivan.damnjanovic@eecs.qmul.ac.uk>
date Mon, 22 Aug 2011 11:46:35 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DL/Majorization Minimization DL/softthreshold.m	Mon Aug 22 11:46:35 2011 +0100
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+% 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);
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