/**
* @param optimalResult
* @param retrievedResult
* @return the Discounted Cumulative Gain for the retrieved NNs vs the optimal NNs (ground truth)
* for the given suspicious document.
*/
private double dcg(GTQuery optimalResult, ResultQuery retrievedResult, int k) {
double dcg = 0;
for (int position = 0; position < k && position < retrievedResult.size(); position++) {
SourceDocument document = retrievedResult.retrievedDocuments.get(position);
// positions count from 0
SourceDocument gt = optimalResult.relevantDocuments.get(document.queryid);
if (gt != null) {
if (document.position == 1) {
dcg += relevanceGrade(document.position, k);
} else {
dcg += relevanceGrade(document.position, k) / MathTools.log2(document.position);
}
}
}
return dcg;
}
@Override
public int hashCode() {
return MathTools.hashCode(run.hashCode(), queryid);
}