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From Grant Ingersoll <>
Subject Document Clustering
Date Thu, 28 May 2009 12:27:30 GMT
I'm about to write some code to prepare docs for clustering and I know  
at least a few others on the list here have done the same.  I was  
wondering if anyone is in the position to share their code and  
contribute to Mahout.

As I see it, we need to be able to take in text and create the matrix  
of terms, where each cell is the TF/IDF (or some other weight, would  
be nice to be pluggable) and then normalize the vector (and, according  
to Ted, we should support using different norms).   Seems like we also  
need the label stuff in place ( 
) but I'm not sure on the state of that patch.

As for the TF/IDF stuff, we sort of have it via the BayesTfIdfDriver,  
but it needs to be a more generic.  I realize we could use Lucene, but  
having a solution that scales w/ Lucene is going to take work, AIUI,  
whereas a M/R job seems more straightforward.

I'd like to be able to get this stuff committed relatively soon and  
have the examples for other people.  My shorter term goal is I'm  
working on some demos using Wikipedia.


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