Hava a look at the "TermDocs" Interface in the API.
You can get term frequency with a open IndexReader
TermDocs termDocs = reader.termDocs(term);
where "term" represents the current Term.
now you can call:
termDocs.freq()
to get the frequency of the term within the current document.
For the calculation of the idf, you can use the provided formula from
the "DefaultSimilarity".
To get the document frequency, which is necessary to calculate the idf,
you can call:
reader.docFreq(term)
Hope this helps...
Thomas
Sengly Heng wrote:
Hello Luceners,
I have a collections of vector of terms (token) that I extracted from
files.
I am looking for ways to calculate TF/IDF of each term.
I wanted to use Lucene to do this but Lucene is made for collections of
files and in my case I have already extracted those files into vector of
terms. I know it is not very difficult to implement this measurement
but I
guess there should be such API available. Does anyone of you know any
Java
API that directly handle this problem? or I have to implement from
scratch.
Any idea would be highly appreciated.
Thank you in advance.
Best regards,
Sengly
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