r/SubredditAnalysis

655 archived posts · May 2014 – Mar 2016

Dedicated to inspecting the demographics of subreddit users.

r/SubredditAnalysis

Archived posts from r/SubredditAnalysis, May 2014 to Mar 2016.

Created May 16, 2014 · restricted

2.7KMembers (last snapshot)

655Archived posts

For examining the various groups in various subreddits. u/RedditAnalysisBot is open source. You can view it here.

I filter posts by flair now.

Meta posts

Bugged drilldowns

To search for a drilldown, in the searchbar of this subreddit enter:

flair:"SubredditName"

I open sourced the bot because:

If there's a flaw it's more likely to be noticed

It offers some transparency

If I disappear and someone wants to run more drilldowns they'll be able to without building another bot from scratch

How does the bot work?

Updated 2014-09-05

First, it grabs the latest 1000 threads from a subreddit's hot queue.

Second, it compiles a list of usernames from the creators of those threads along with the people commenting in them (while ignoring submissions/comments with a karma score of -4 and lower).

Then, the bot crawls through their last 1000 comments/submissions in their user history to find out where else they post (also ignoring comments/submissions with a karma score of -4 or lower) while keeping tally to see which subreddits have the highest overlap.

Finally, the bot calculates the similarity between subreddit samples.

How to calculate similarity between two subreddits:

sqrt(AB * BA) / sqrt(A * B)

AB = overlapping users from subreddit A

BA = overlapping users from subreddit B

A = number of users found by the bot in subreddit A

B = number of users found by the bot in subreddit B

Other stuff:

I excluded default and former default subreddits

I take requests for specific subreddits.

Other communities

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