/*
* 過濾頻率過低字詞
*/
public static TreeMap<String, Double> QueryExpansion(
Map<String, Double> revisedQuery, double minWeight, int maxTermCount) {
SortedSet<Entry<String, Double>> sortedTerms =
SetUtility.entriesSortedByValuesDesc(revisedQuery);
TreeMap<String, Double> result = new TreeMap<String, Double>();
String term = null;
Double weight = 0.0;
for (Entry<String, Double> entry : sortedTerms) {
term = entry.getKey();
weight = entry.getValue();
if (result.size() < maxTermCount && weight >= minWeight) {
result.put(term, weight);
}
}
return result;
}
public static void main(String[] args) {
Rocchio_termfiltered ro = new Rocchio_termfiltered("302", 20, 0.6, 0);
System.out.println(SetUtility.entriesSortedByValuesDesc(ro.getRevisedQuery()));
}