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added ompbox_fast as sparse approximation solver, which calls the functions in ompbox using the fastest implementation
author Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk>
date Wed, 11 Apr 2012 16:13:08 +0100
parents 0de08f68256b
children
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function x= thresh(x, K)

[~, ind] = sort(abs(x), 'descend');
x(ind(K+1:end))= 0;