java如何使用lucene计算单词支持度和可信度

Question

我想在Java应用程序中使用Lucene来计算单词支持度和置信度。 我有500多个。txt文档，ArrayList包含两个术语，术语i和术语j

The formula for counting Confidence

Dti-tj/Dti

Dti-tj: Total document contains term i,term j
Dti : Total document contains term i

The formula for counting Support

Dti-tj/D

Dti-tj = Total document contains term i,term j
D = Total Document in the collection

是否可以使用Lucene搜索和计算单词？ 我要上什么课

Answer 1

我只需搜索您的两个术语，termi和termj，并从搜索返回的totalHits中获取您的计数

int docCount = indexReader.numDocs();
IndexSearcher searcher = new IndexSearcher(indexReader);

Query queryI = new TermQuery(new Term(fieldName, termI));
Query queryJ = new TermQuery(new Term(fieldName, termJ));

Query queryIJ = new BooleanQuery();
queryIJ.add(new BooleanClause(queryI, BooleanClause.Occur.SHOULD));
queryIJ.add(new BooleanClause(queryJ, BooleanClause.Occur.SHOULD));

int countI = searcher.search(nqueryI, maxDocs).totalHits;
int countIJ = searcher.search(, maxDocs).totalHits;

float confidence = (float)countIJ / (float)countI;
float support = (float)countIJ / (float)docCount;