I had a look into the 3.0 implementation
The calculation of the similarity is
1 - (edit distance / min (string 1 length, string 2 length)
As opposed to the levenstein in spellchecker
1 - (edit distance / max (string 1 length, string 2 length)
So, the similarity is 1 - ( 3 / min(3,6)) = 0.
--
Sven
-----Ursprüngliche Nachricht-----
Von: Biedermann,S.,Fa. Post Direkt [mailto:s.biederm...@postdirekt.de]
Gesendet: Dienstag, 3. Mai 2011 11:43
An: java-user@lucene.apache.org
Betreff: AW: "fuzzy prefix" search
Have you tried
Query q = new FuzzyQuery( new Term( "test", "Mer" ), 0.499f);
Sven
-----Ursprüngliche Nachricht-----
Von: Clemens Wyss [mailto:clemens...@mysign.ch]
Gesendet: Dienstag, 3. Mai 2011 10:57
An: java-user@lucene.apache.org
Betreff: AW: "fuzzy prefix" search
Sorry for coming back to my issue. Can anybody explain why my "simple" unit
test below fails? Any hint/help appreciated.
Directory directory = new RAMDirectory();
IndexWriter indexWriter = new IndexWriter( directory, new StandardAnalyzer(
Version.LUCENE_31 ), IndexWriter.MaxFieldLength.UNLIMITED );
Document document = new Document();
document.add( new Field( "test", "Merlot", Field.Store.YES,
Field.Index.ANALYZED ) );
indexWriter.addDocument( document );
IndexReader indexReader = indexWriter.getReader();
IndexSearcher searcher = new IndexSearcher( indexReader );
Query q = new FuzzyQuery( new Term( "test", "Mer" ), 0.5f, 0, 10 );
// or Query q = new FuzzyQuery( new Term( "test", "Mer" ), 0.5f);
TopDocs result = searcher.search( q, 10 );
Assert.assertEquals( 1, result.totalHits );
- Clemens
> -----Ursprüngliche Nachricht-----
> Von: Clemens Wyss [mailto:clemens...@mysign.ch]
> Gesendet: Montag, 2. Mai 2011 23:01
> An: java-user@lucene.apache.org
> Betreff: AW: "fuzzy prefix" search
>
> Is it the combination of FuzzyQuery and Term which makes the search to go
> for "word boundaries"?
>
> > -----Ursprüngliche Nachricht-----
> > Von: Clemens Wyss [mailto:clemens...@mysign.ch]
> > Gesendet: Montag, 2. Mai 2011 14:13
> > An: java-user@lucene.apache.org
> > Betreff: AW: "fuzzy prefix" search
> >
> > I tried this too, but unfortunately I only get hits when the search
> > term is a least as long as the word to be looked up.
> >
> > E.g.:
> > ...
> > Directory directory = new RAMDirectory(); IndexWriter indexWriter =
> > new IndexWriter( directory, IndexManager.getIndexingAnalyzer(
> LOCALE_DE ),
> > IndexWriter.MaxFieldLength.UNLIMITED );
> >
> > Document document = new Document();
> > document.add( new Field( "test", "Merlot",
> > Field.Store.YES, Field.Index.ANALYZED ) );
> indexWriter.addDocument(
> > document );
> >
> > IndexReader indexReader = indexWriter.getReader(); IndexSearcher
> > searcher = new IndexSearcher( indexReader );
> >
> > Query q = new FuzzyQuery( new Term( "test", "Mer" ), 0.6f, 1 );
> > TopDocs result = searcher.search( q, 10 ); Assert.assertEquals( 1,
> result.totalHits ); ...
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: Uwe Schindler [mailto:u...@thetaphi.de]
> > > Gesendet: Montag, 2. Mai 2011 13:50
> > > An: java-user@lucene.apache.org
> > > Betreff: RE: "fuzzy prefix" search
> > >
> > > Hi,
> > >
> > > You can pass an integer to FuzzyQuery which defines the number of
> > > characters that are seen as prefix. So all terms must match this
> > > prefix and the rest of each term is matched using fuzzy.
> > >
> > > Uwe
> > >
> > > -----
> > > Uwe Schindler
> > > H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de
> > > eMail: u...@thetaphi.de
> > >
> > > > -----Original Message-----
> > > > From: Clemens Wyss [mailto:clemens...@mysign.ch]
> > > > Sent: Monday, May 02, 2011 1:47 PM
> > > > To: java-user@lucene.apache.org
> > > > Subject: "fuzzy prefix" search
> > > >
> > > > I'd like to search fuzzily but not on a full term.
> > > > E.g.
> > > > I have a text "Merlot del Ticino"
> > > > I'd like
> > > > "mer", "merr", "melo", ... to match.
> > > >
> > > > If I use FuzzyQuery only "merlot, "merlott" hit. What
> > > > Query-combination should I use?
> > > >
> > > > Thx
> > > > Clemens
> > > >
> > > >
> > > > ------------------------------------------------------------------
> > > > --
> > > > - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
> > > > For additional commands, e-mail: java-user-h...@lucene.apache.org
> > >
> > >
> > >
> > > --------------------------------------------------------------------
> > > - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
> > > For additional commands, e-mail: java-user-h...@lucene.apache.org
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
> > For additional commands, e-mail: java-user-h...@lucene.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
> For additional commands, e-mail: java-user-h...@lucene.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
