lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From 장용석 <need4...@gmail.com>
Subject Re: Terms.getSumTotalTermFreq() in Lucene 4.0
Date Sat, 05 Jan 2013 00:59:00 GMT
Hello Mike.
Thanks for your reply.

It's not an important issue.
I'll waiting for next release version including this patch.

Thanks.

2013/1/4 Michael McCandless <lucene@mikemccandless.com>

> The problem is that the TermVectorsFormat for the default codec
> (Lucene40TermVectorsFormat) does not store this statistic
> per-document, currently.  We could in theory fix this ... maybe open
> an issue / make a patch if it's important?
>
> -1 return value is actually "valid": it means this statistic is not
> available.
>
> Mike McCandless
>
> http://blog.mikemccandless.com
>
> On Fri, Jan 4, 2013 at 2:39 AM, 장용석 <need4spd@gmail.com> wrote:
> > Hello.
> > I have some questions.
> >
> > Document 1 : "learning perl learning java learning ruby"
> > Document 2 : "perl test"
> >
> > I have indexed this documents, with StoreTermVectors(true) and
> > IndexOptions.DOCS_AND_FREQS.
> > Field name is "f".
> >
> > And I executed this code.
> >
> > IndexReader ir = IndexReader.open(dir);
> > Terms terms = ir.getTermVector(0, "f");
> >
> > System.out.println(terms.getDocCount()); -> 1
> > System.out.println(terms.getSumDocFreq()); -> 4
> > System.out.println(terms.getSumTotalTermFreq()); -> -1
> >
> > I think this terms instance acts like a single-document inverted index.
> >
> > So getDocCount is 1 (single document), and getSumDocFreq is 4. (because
> > each term's docFreq is 1)
> > Is this right?
> >
> > But I can't understand why getSumTotalTermFreq method return -1.
> > In javadoc getSumTotalTermFreq is sum of
> >
> TermsEnum.totalTermFreq<eclipse-javadoc:%E2%98%82=aboutLucene4/lib%5C/lucene-core-4.0.0.jar%3Corg.apache.lucene.index(Terms.class%E2%98%83Terms~getSumTotalTermFreq%E2%98%82TermsEnum%E2%98%82totalTermFreq>
> > .
> >
> > I think in Document1, each term's totalTermFreqs are [learning, 3],
> [java,
> > 1], [perl, 1], [ruby, 1].
> > So getSumTotalTermFreq method's result is 6 not -1.
> >
> > Why temrs.getSumTotalTermFreq() method return -1?
> >
> >
> > Thanks in advance.
> > --
> > DEV용식
> > http://devyongsik.tistory.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>


-- 
DEV용식
http://devyongsik.tistory.com

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message