// <inheritdoc>
public double Evaluate(DateTime testStart, DateTime testEnd, double Radius)
{
this.logger.info("Evaluating the Model.");
IList <Incident> testSet = this.incidentService.getForDateRange(testStart, testEnd).OrderBy(x => x.DateCreated).ToList();
IKdTreeWrapper <double, string> kdTree = this.generateKdTree(testSet);
double correct = 0;
double error = 0;
double countDone = 0;
double countToDo = testSet.Count;
foreach (var currentIncident in testSet)
{
CrimeType currentType = default(CrimeType);
if (!Enum.TryParse(currentIncident.CrimeType, out currentType))
{
this.logger.debug($"Could not parse crime type {currentIncident.CrimeType}");
continue;
}
if (!this.mixedMarkovModel.IsGenerated(currentType))
{
this.logger.debug($"model was not generated for {currentType}");
continue;
}
var predictedPoint = this.mixedMarkovModel.Predict(currentType);
if (predictedPoint == null)
{
this.logger.debug($"predicted point was null for {currentIncident.ID}");
continue;
}
var nearest = kdTree.GetNearestNeighbours(predictedPoint);
if (this.distanceMeasure.measure(nearest, predictedPoint) <= Radius)
{
this.logger.debug($"Match found between predicted { predictedPoint[0] } , { predictedPoint[1] } and Incident { nearest }");
correct++;
}
else
{
error++;
}
this.mixedMarkovModel.AddIncident(currentIncident);
this.progressCheck(++countDone, countToDo);
}
return(correct / (correct + error));
}
/// <summary>
/// Initializes a new instance of the <see cref="T:com.kiranpatel.crimecluster.framework.Cluster"/> class.
/// </summary>
/// <param name="label">Label.</param>
/// <param name="cluster">Cluster.</param>
public Cluster(int label, HashSet <double[]> cluster)
{
this.Label = label;
this.Points = new KdTreeWrapper <double, string>(new DoubleMath());
foreach (var currentPoint in cluster)
{
this.Points.Add(currentPoint, label.ToString());
}
this.Points.Balance();
}
/// <summary>
/// Computes the average latitude and longitude for a given kd-tree.
/// </summary>
/// <param name="value">Value.</param>
public static double[] Average(this IKdTreeWrapper <double, string> value)
{
var enumerator = value.GetEnumerator();
double latitude = 0;
double longitude = 0;
while (enumerator.MoveNext())
{
double[] current = enumerator.Current.Point;
latitude += current[0];
longitude += current[1];
}
latitude /= value.Count();
longitude /= value.Count();
return(new double[] { latitude *2, longitude *2 });
}
