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Posted to dev@lucene.apache.org by "Grant Ingersoll (JIRA)" <ji...@apache.org> on 2006/11/03 14:23:17 UTC
[jira] Commented: (LUCENE-706) Index File Format - Example for
frequency file .frq is wrong
[ http://issues.apache.org/jira/browse/LUCENE-706?page=comments#action_12446948 ]
Grant Ingersoll commented on LUCENE-706:
----------------------------------------
Just to double check the math:
>From the Website:
"DocDelta determines both the document number and the frequency. In particular, DocDelta/2 is the difference between this document number and the previous document number (or zero when this is the first document in a TermFreqs). When DocDelta is odd, the frequency is one. When DocDelta is even, the frequency is read as another VInt."
So, 15 is the correct start since 15 /2 as an int is 7 and the frequency is one. Then the difference between doc 7 and 11 is 4, so the next value should be 8 (since DocDelta/2 = 11 - 7, which is even, meaning the frequency is the next VInt, in this case 3, so I would concur.
> Index File Format - Example for frequency file .frq is wrong
> ------------------------------------------------------------
>
> Key: LUCENE-706
> URL: http://issues.apache.org/jira/browse/LUCENE-706
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Website
> Environment: not applicable
> Reporter: Doron Cohen
> Assigned To: Doron Cohen
> Priority: Trivial
> Attachments: file-format-frq-example.patch
>
>
> Reported by Johan Stuyts - http://www.nabble.com/Possible-documentation-error--p7012445.html -
> Frequency file example says:
> For example, the TermFreqs for a term which occurs once in document seven and three times in document eleven would be the following sequence of VInts:
> 15, 22, 3
> It should be:
> For example, the TermFreqs for a term which occurs once in document seven and three times in document eleven would be the following sequence of VInts:
> 15, 8, 3
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