Tf-Idf_Search

My attempt at a TF-IDF search engine which makes use of the Pandas library to store the terms and numpy to do all the mathematical calculations

1. Uses SQLite for local vector space persistance
2. C++ Bindings used for document preprocessing to achieve significant speedup

tf-idf algorithm: https://en.wikipedia.org/wiki/Tf%E2%80%93idf

Possible future updates (in no particular order)

• port the Porter Stemmer algorithm to c++ and multithread it
• use sparse matrices to represent the vector space
• implement a frontend interface for the app
• benchmark cosine similarity again Eigen (C++) implementation and bind it?
• change pandas dataframe to np array in maptomatrix()
• Make the search typo insensitive

How to run:

1. run make in the src/ path to create the shared library used by the python bindings
2. refer to main.py on how to use the SearchEngine class

note: if you want to change the max_docs parameter in the SearchEngine constructor and already have run the app on a source path, you will need to delete the searchUtils/ dir at that source path