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annotate util/snr.m @ 162:88578ec2f94a danieleb

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Updated grassmannian function and minor debugs
author Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk>
date Wed, 31 Aug 2011 13:52:23 +0100
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daniele@162 1 function x = snr(s,r)
daniele@162 2 % SNR calculates the signal-to-noise ratio between the signal s and its
daniele@162 3 % representation r defined as:
daniele@162 4 % SNR = 20*log10(||s||_2/||s-r||_2)
daniele@162 5 err = s-r;
daniele@162 6 x = mag2db(norm(s(:))/norm(err(:)));