@Override
public final Explanation explain(BasicStats stats) {
return Explanation.match(
lambda(stats),
getClass().getSimpleName() + ", computed from: ",
Explanation.match(stats.getDocFreq(), "docFreq"),
Explanation.match(stats.getNumberOfDocuments(), "numberOfDocuments"));
}
@Override
public final float lambda(BasicStats stats) {
return (stats.getDocFreq() + 1F) / (stats.getNumberOfDocuments() + 1F);
}
