fastdtw-x's Introduction

FastDTW-x

C++ porting of Stan Salvador's FastDTW

Usage: iOS,use Cocoapods,add line in podfile: pod 'FastDTW-x' Other platform,Import all source files in Classes folder.

Sample code:

#include "DTW.h"
#include "FastDTW.h"
#include "EuclideanDistance.h"
#include <iostream>

using namespace fastdtw;

extern double *sample1;
extern double *sample2;
extern int sampleLength;

void testDTW()
{
    TimeSeries<double,1> tsI;
    for (int i = 0; i<sampleLength; ++i) {
        tsI.addLast(i, TimeSeriesPoint<double,1>(sample1+i));
    }

    TimeSeries<double,1> tsJ;
    for (int i = 0;i<sampleLength; ++i)
    {
        tsJ.addLast(i, TimeSeriesPoint<double,1>(sample2+i));
    }

    TimeWarpInfo<double> info =  STRICT::getWarpInfoBetween(tsI,tsJ,EuclideanDistance());
    printf("Warp Distance by DTW:%lf\n",info.getDistance());
    info.getPath()->print(std::cout);
}

void testFastDTW()
{
    TimeSeries<double,1> tsI;
    for (int i = 0; i<sampleLength; ++i) {
        tsI.addLast(i, TimeSeriesPoint<double,1>(sample1+i));
    }

    TimeSeries<double,1> tsJ;
    for (int i = 0;i<sampleLength; ++i)
    {
        tsJ.addLast(i, TimeSeriesPoint<double,1>(sample2+i));
    }

    TimeWarpInfo<double> info =  FAST::getWarpInfoBetween(tsI,tsJ,EuclideanDistance());
    printf("Warp Distance by DTW:%lf\n",info.getDistance());
    info.getPath()->print(std::cout);
}

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