where P is the number of votes, T is the time in hours since submission, and G is a power that controls the steepness/rate of decline in ranking, so popularity is decreases exponentially over time. I'm sure that YC-affiliated posts have a different ranking algorithm, considering you can't vote on them.
Some other cool algorithms are:
del.icio.us / delicious.com 's: ranked by upvotes in the last hour. I like the elegance of this solution a lot :)
reddit's "best" feature: compares the rates at which comments are upvoted to generate the probability that a comment is a good one, which is how posts with fewer votes can be ranked better than posts with more votes. It works well, in my opinion.
Comments
direct copy from http://news.ycombinator.com/item?id=4746566
According to the link in dmgrow's comment, it's
where P is the number of votes, T is the time in hours since submission, and G is a power that controls the steepness/rate of decline in ranking, so popularity is decreases exponentially over time. I'm sure that YC-affiliated posts have a different ranking algorithm, considering you can't vote on them.Some other cool algorithms are:
del.icio.us / delicious.com 's: ranked by upvotes in the last hour. I like the elegance of this solution a lot :)
reddit's "best" feature: compares the rates at which comments are upvoted to generate the probability that a comment is a good one, which is how posts with fewer votes can be ranked better than posts with more votes. It works well, in my opinion.