protected override double[] Extract(double[] intervals, double[] amplitude)
{
ExtremaPointType nextLocalPoint = start;
int fromIndex = 0;
List <double[]> pointFeatures = new List <double[]>();
using (IEnumerator <ExtremaSearchConfig> iterator = searchConfig.GetEnumerator())
{
while (iterator.MoveNext())
{
ExtremaSearchConfig config = iterator.Current;
PointIndexPair extremaPoint = Find(nextLocalPoint, fromIndex, config, intervals, amplitude);
if (extremaPoint.IndexOutOfRange && config.GeometricRecoveryConfig != null)
{
GeometricRecoveryConfig recoveryConfig = config.GeometricRecoveryConfig;
// use triangular approximation to attempt missing point recovery (need to do 2 points - this + next to approximate missing point)
extremaPoint = FindTriangular(nextLocalPoint, fromIndex, recoveryConfig.FirstPointSensitivity, recoveryConfig.FirstTriangleLength, intervals, amplitude);
// add first recovered point
pointFeatures.Add(GetFeatures(extremaPoint, intervals, config.DataModel));
// skip forward one if we can since we've already found the next point
if (!iterator.MoveNext())
{
break;
}
config = iterator.Current;
// recover the second point (which would also be "missing")
nextLocalPoint = Alternate(nextLocalPoint);
extremaPoint = FindTriangular(nextLocalPoint, extremaPoint.PointIndex, recoveryConfig.SecondPointSensitivity, recoveryConfig.SecondTriangleLength, intervals, amplitude);
}
pointFeatures.Add(GetFeatures(extremaPoint, intervals, config.DataModel));
fromIndex = extremaPoint.PointIndex;
nextLocalPoint = Alternate(nextLocalPoint);
}
}
return(pointFeatures.SelectMany(p => p).ToArray());
}
public ExtremaSearchConfig(int sensitivity, ExtremaDataModel dataModel, int?searchIndexLimit = null, GeometricRecoveryConfig geometricRecoveryConfig = null, double?startAmplitude = null)
{
this.Sensitivity = sensitivity;
this.DataModel = dataModel;
this.GeometricRecoveryConfig = geometricRecoveryConfig;
this.SearchIndexLimit = searchIndexLimit;
this.StartAmplitude = startAmplitude;
}
public GeometricExtractorBuilder FindExtremaPoint(int sensitivity, ExtremaDataModel dataModel = ExtremaDataModel.TIME_AMPLITUDE, int?searchIndexLimit = null, GeometricRecoveryConfig geometricRecoveryConfig = null, double?startAmplitude = null)
{
searchConfig.Add(new ExtremaSearchConfig(sensitivity, dataModel, searchIndexLimit, geometricRecoveryConfig, startAmplitude));
return(this);
}