57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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QM DSP Library
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Centre for Digital Music, Queen Mary, University of London.
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This file 2005-2006 Christian Landone.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#include "Correlation.h"
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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Correlation::Correlation()
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{
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}
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Correlation::~Correlation()
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{
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}
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void Correlation::doAutoUnBiased(double *src, double *dst, unsigned int length)
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{
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double tmp = 0.0;
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double outVal = 0.0;
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unsigned int i,j;
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for( i = 0; i < length; i++)
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{
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for( j = i; j < length; j++)
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{
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tmp += src[ j-i ] * src[ j ];
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}
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outVal = tmp / ( length - i );
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if( outVal <= 0 )
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dst[ i ] = EPS;
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else
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dst[ i ] = outVal;
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tmp = 0.0;
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}
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}
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