public void calculate() {
final int partitionCount = getPartitionsCount(documents);
if (partitionCount == 0) {
return;
}
int weightSum = 0;
double contaminationSum = 0;
for (Cluster cluster : clusters) {
if (cluster.isOtherTopics()) {
continue;
}
final double contamination = calculate(cluster, partitionCount);
cluster.setAttribute(CONTAMINATION, contamination);
contaminationSum += contamination * cluster.size();
weightSum += cluster.size();
}
weightedAverageContamination = contaminationSum / weightSum;
}
public Double apply(Cluster cluster) {
return cluster.isOtherTopics() ? 1.0 : -1.0;
}