You have a collection of text documents, and you want to build their TF-IDF weight vectors, probably before doing some clustering on the collection or other related tasks. You would like to be able for instance to see what are the tokens with the biggest TF-IDF weights in any given document of the collection. Lucene and Mahout can help you to do that almost in a snap. Step 1 : Build a Lucene Inde
![How To Easily Build And Observe TF-IDF Weight Vectors With Lucene And Mahout](https://cdn-ak-scissors.b.st-hatena.com/image/square/8d71ff5111e05619a10d29bb40d7aebaa75c8fbc/height=288;version=1;width=512/https%3A%2F%2Fs0.wp.com%2Fi%2Fblank.jpg)