On my site users will be able to give a 1 to 5 rating for various different products. I want to show users other users that have rated products in a similar way.
So in simplistic terms, if the followong users rated a prodcut like so:
User A - 5 stars User B - 4 stars User C - 1 stars User D - 0 stars
Then User A and User B would be matched, and User C and User D would also be matched.
How sophisticated an algorithm is achievable with only drupal modules and minimal php? Ideally a point system would find the similarity / difference between users’ ratings for all the products that they have both rated, and then find the top 5 closest matches and rank them accordingly. Thanks