Rocchio: Relevance Feedback in Learning Classification Algorithms

Given a large amount of documents it is hard to find the documents that you need. These days most -if not allof these documents are available electronically. Information Retrieval (IR) systems help in finding the documents that satisfy the user’s information need. There are many techniques that are used by these IR systems. One of these techniques is learning classification. This technique uses preclassified training documents for classification of documents in the document base. Rocchio is one of these learning classification algorithms. In this article test data are used to compare Rocchio to two other algorithms. Usually Rocchio does not do very well compared to these other algorithms, but in this experiment Rocchio comes out as the best. When certain techniques are used to boost Rocchio, it can certainly compete with the other algorithms.