qm-dsp  1.8
Correlation.cpp
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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2 
3 /*
4  QM DSP Library
5 
6  Centre for Digital Music, Queen Mary, University of London.
7  This file 2005-2006 Christian Landone.
8 
9  This program is free software; you can redistribute it and/or
10  modify it under the terms of the GNU General Public License as
11  published by the Free Software Foundation; either version 2 of the
12  License, or (at your option) any later version. See the file
13  COPYING included with this distribution for more information.
14 */
15 
16 #include "Correlation.h"
17 
19 // Construction/Destruction
21 
23 {
24 
25 }
26 
28 {
29 
30 }
31 
32 void Correlation::doAutoUnBiased(double *src, double *dst, unsigned int length)
33 {
34  double tmp = 0.0;
35  double outVal = 0.0;
36 
37  unsigned int i,j;
38 
39  for( i = 0; i < length; i++)
40  {
41  for( j = i; j < length; j++)
42  {
43  tmp += src[ j-i ] * src[ j ];
44  }
45 
46 
47  outVal = tmp / ( length - i );
48 
49  if( outVal <= 0 )
50  dst[ i ] = EPS;
51  else
52  dst[ i ] = outVal;
53 
54  tmp = 0.0;
55  }
56 }
virtual ~Correlation()
Definition: Correlation.cpp:27
#define EPS
void doAutoUnBiased(double *src, double *dst, unsigned int length)
Definition: Correlation.cpp:32