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From 장용석 <need4...@gmail.com>
Subject Re: Terms.getSumTotalTermFreq() in Lucene 4.0
Date Mon, 07 Jan 2013 14:22:47 GMT
Hi,
Ah.. I understand.
If I need this, I'll open an issue.

Thank you very much.

2013/1/5 Michael McCandless <lucene@mikemccandless.com>

> Hi,
>
> The next version won't have a fix for this unless someone opens an
> issue / posts a patch.
>
> Mike McCandless
>
> http://blog.mikemccandless.com
>
> On Fri, Jan 4, 2013 at 7:59 PM, 장용석 <need4spd@gmail.com> wrote:
> > 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
> >>
> >> ---------------------------------------------------------------------
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> >>
> >>
> >
> >
> > --
> > DEV용식
> > http://devyongsik.tistory.com
>
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>


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

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