Popularity algorithm

Question

On SO 18 Joel mentioned an algorithm that would rank items based on their age and popularity and it\'s based on gravity. Could someone post this? C# would be lovely, but re

Answer 1

My understanding is that it is approximately the following from another Jeff Atwood post

t = (time of entry post) - (Dec 8, 2005)
x = upvotes - downvotes

y = {1 if x > 0, 0 if x = 0, -1 if x < 0)
z = {1 if x < 1, otherwise x}

log(z) + (y * t)/45000

Answer 2

alt text http://www.mt-soft.com.ar/wordpress/wp-content/plugins/wp-o-matic/cache/0ad4d_reddit_cf_algorithm.png