May be I dont understand your question.

we apply this formula
http://search.apache.org/~doronc/api/org/apache/lucene/search/DefaultSimilarity.html#idf%28int,%20int%29

to "frequency.file-0". (seq2sparse output with term DocFreq)

Just checked TF vectors and TFIDF vectors, this furmula gives me correct IDF 
values

Pavel
________________________________________
От: Dmitriy Lyubimov [[email protected]]
Отправлено: 7 декабря 2012 г. 7:35
To: [email protected]
Тема: seq2sparse dictionary question

Hello,
Is there a way to get access to idf vector of all terms upon tf-idf
computation?

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