public static LocalPatternMatch CreateFrom(LocalPattern p0, LocalPattern p1)
{
var match = new LocalPatternMatch();
match.Dist = p0.DistanceTo(p1);
match.X = p0.Position;
match.Y = p1.Position;
match.PositionDelta = p1.Position - p0.Position;
match.AmplitudeDelta = p1.Amplitude - p0.Amplitude;
match.TempScaleDelta = p1.TemporalScale - p0.TemporalScale;
match.AmpScaleDelta = p1.AmplitudeScale - p0.AmplitudeScale;
return match;
}
public double DistanceTo(LocalPattern lp1)
{
double shapeDiffSum = 0;
for (int i = 0; i < Shape.Count; ++i)
{
shapeDiffSum += Math.Abs(lp1.Shape[i] - Shape[i]);
}
//return shapeDiffSum;
//return Math.Abs(lp1.Amplitude - Amplitude);
return Math.Abs(lp1.Shape[0] - Shape[0]);
}
private static IList<LocalPattern> GetLocalPatterns(IList<double> data, int windowSize)
{
var lps = new List<LocalPattern>();
int halfWs = windowSize/2;
for (int i = halfWs; i < data.Count - halfWs; i += halfWs)
{
var lp = new LocalPattern();
lp.Position = (double)i / (data.Count - 1);
double ampSum = 0;
var nums = new double[windowSize];
for (int k = -halfWs; k <= halfWs; k++)
{
nums[k + halfWs] = data[i + k];
ampSum += data[i + k];
}
lp.Amplitude = ampSum/windowSize;
lp.Shape = MathUtil.Dwt(nums);
lps.Add(lp);
}
return lps;
}