vectorization of a text file

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Published on 2012-03-21T17:25:28Z Indexed on 2012/03/21 17:29 UTC
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vectorization

I am trying to implement vectorization of a text file...I have created a dictionary (Unique words in all the documents) ... Which is the best way to implement this in java?

For example - My dictionary has the following words - {w1, w2, w3, w4} And I have 2 documents each having subset of the words in the vocabulary. I need to write to a text file the matrix in the form --

1,3,4,0
0,0,2,1

Here each row represents a document and the values represent the occurrence of each word in the document.

Can you suggest me the most efficient way to implement this in Java?

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