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https://issues.apache.org/jira/browse/MAHOUT-1549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13996646#comment-13996646
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Andy Schlaikjer commented on MAHOUT-1549:
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Hi Richard, Were you the one who recently asked about this over here?:
https://github.com/kevinweil/elephant-bird/issues/389
If not, give that thread a read and let me know if that answers your question
here.
Thanks!
> Extracting tfidf-vectors by key
> -------------------------------
>
> Key: MAHOUT-1549
> URL: https://issues.apache.org/jira/browse/MAHOUT-1549
> Project: Mahout
> Issue Type: Question
> Components: Classification
> Affects Versions: 0.7, 0.8, 0.9
> Reporter: Richard Scharrer
> Labels: documentation, features, newbie
>
> Hi,
> I have about 200000 tfidf-vectors and I need to extract 500 of them of which
> I have the keys. Is there some kind of magical option which allows me
> something like taking the output of mahout seqdumper and transform it back
> into a sequencefile that I can use for trainnb /testnb? The sequencefiles of
> tfidf use the Text class for the keys and the VectorWritable class for the
> values. I tried
> https://github.com/kevinweil/elephant-bird/blob/master/pig/src/main/java/com/twitter/elephantbird/pig/store/SequenceFileStorage.java
> with different settings but the output always gives me the Text class for
> both, key and value which can't be used in trainnb and testnb.
> I posted this question on:
> http://stackoverflow.com/questions/23502362/extracting-tfidf-vectors-by-key-without-destroying-the-fileformat
> I ask this question in here because I've seen similar questions on
> stackoverflow that where asked last year and still didn't get an answer
> I really need this information so in case you know anything please tell me.
> Regards,
> Richard
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