/// <summary>
/// Add a item to this cluster and adjust the cluster vector, itemship list and sum vector accordingly.
/// </summary>
/// <param name="item">The item to be added.</param>
public void AddItemToCluster(FeatureItem item)
{
if (!ClusterItemList.Contains(item))
{
ClusterItemList.Add(item);
AdaptiveIntersect.UpdateFeatureIntersectionByLast(ClusterItemList, ClusterVector);
AdaptiveIntersect.UpdateFeatureSummaryByLast(ClusterItemList, ClusterVectorSummary);
//----- remove for debugging and tests only
tempClusterVectorMagnitude = AdaptiveIntersect.CalculateVectorMagnitude(ClusterVector); //remove for debugging and tests only
tempClusterVectorSummaryMagnitude = AdaptiveIntersect.CalculateVectorMagnitude(ClusterVectorSummary); //remove for debugging and tests only
}
}
/// <summary>
/// Constructor. Cluster vector is set to the initial feature vector.
/// </summary>
/// <param name="item">The item used to construct this cluster</param>
public Cluster(FeatureItem item)
{
//resulting values should be copied
ClusterVector = new double[item.FeatureVector.Length];
Array.Copy(item.FeatureVector, ClusterVector, item.FeatureVector.Length);
ClusterVectorSummary = new double[item.FeatureVector.Length];
Array.Copy(item.FeatureVector, ClusterVectorSummary, item.FeatureVector.Length);
ClusterItemList = new List <FeatureItem>();
ClusterItemList.Add(item);
//----- remove for debugging and tests only
tempClusterVectorMagnitude = AdaptiveIntersect.CalculateVectorMagnitude(ClusterVector); //remove for debugging and tests only
tempClusterVectorSummaryMagnitude = AdaptiveIntersect.CalculateVectorMagnitude(ClusterVectorSummary); //remove for debugging and tests only
}
/// <summary>
/// Remove a item from this cluster and update cluster Vector accordingly (basd on other assigned items)
/// Return false if ItemList is empty
/// </summary>
/// <param name="item">The item to be removed</param>
public bool RemoveItemFromCluster(FeatureItem item)
{
if (ClusterItemList.Remove(item) == true)
{
if (ClusterItemList.Count > 0) //recalculate vector summary only if not empty
{
AdaptiveIntersect.CalculateFeatureIntersection(ClusterItemList, ClusterVector);
AdaptiveIntersect.CalculateFeatureSummary(ClusterItemList, ClusterVectorSummary);
//----- remove for debugging and tests only
tempClusterVectorMagnitude = AdaptiveIntersect.CalculateVectorMagnitude(ClusterVector); //remove for debugging and tests only
tempClusterVectorSummaryMagnitude = AdaptiveIntersect.CalculateVectorMagnitude(ClusterVectorSummary); //remove for debugging and tests only
}
}
return(ClusterItemList.Count > 0);
}