Introduction to Recommender Sys part I (Static)

Data types:

1. Explict

2. Implict

Difference between Recommender and prediction: The recommended system suggests something you might be interested in (top n interested), while predictions predict how much your users will like them.

Top-n + softer/organic Presentation (recommended system uses a form of soft advertising to gain trust)

Wilson score interval is used to calculate the confidence level of the evaluation/score

Http://en.wikipedia.org/wiki/Binomial_proportion_confidence_interval#Wilson_score_interval

How to rank:

1. http://amix.dk/blog/post/19574

2. http://amix.dk/blog/post/19588

3. https://possiblywrong.wordpress.com/2011/06/05/reddits-comment-ranking-algorithm/

4. Http://www.evanmiller.org/how-not-to-sort-by-average-rating.html
   

Introduction to Recommender Sys part I (Static)