private static void HandleOldCluster(List <FeatureVector> vectors,
ICollection <ClusterGroup> clusters, ClusterGroup oldCluster)
{
var oldCustomers = vectors.FindAll(c => c.Cluster == oldCluster);
if (oldCustomers.Count == 0)
{
clusters.Remove(oldCluster);
}
if (oldCustomers.Count > 0)
{
oldCluster.Prototype = oldCustomers[0].Features;
}
foreach (var c in oldCustomers)
{
oldCluster.AssignAnd(c.Features);
}
}
private void CreateClusters(List <FeatureVector> Vectors, IList <ClusterGroup> Clusters)
{
var foundPrototype = false;
var currentIter = 0;
while (!foundPrototype)
{
foundPrototype = true;
foreach (var featureVector in Vectors)
{
foreach (var cluster in Clusters)
{
if (cluster == featureVector.Cluster)
{
continue;
}
if (!SimilarityTest(cluster.Prototype, featureVector.Features))
{
continue;
}
if (!AttentionTest(cluster.Prototype, featureVector.Features))
{
continue;
}
var oldCluster = featureVector.Cluster;
featureVector.Cluster = cluster;
if (oldCluster != null)
{
HandleOldCluster(Vectors, Clusters, oldCluster);
}
var newVectors = Vectors.FindAll(c => c.Cluster == cluster);
if (newVectors.Count > 0)
{
cluster.Prototype = newVectors[0].Features;
}
foreach (var v in newVectors)
{
cluster.AssignAnd(v.Features);
}
foundPrototype = false;
break;
}
if (featureVector.Cluster != null)
{
continue;
}
var newCluster = new ClusterGroup(featureVector);
Clusters.Add(newCluster);
featureVector.Cluster = newCluster;
foundPrototype = false;
}
currentIter++;
if (currentIter > MaxIterations)
{
break;
}
}
}
