Yet another R package for learning Ising models

You can get it here: https://github.com/slycoder/Rflim

Read this for a quick explanation: https://www.facebook.com/note.php?note_id=10150359708746212

Leave a comment

Filed under Uncategorized

Baseball on Facebook

Some of you might be interested in a little analysis we did of baseball fandom on Facebook.

Baseball season is in full swing again! March 31st was opening day for Major League Baseball and while we can’t all be swinging the bat or fielding first base in Giants’ stadium, all of us can cheer on our favorite team. Many of you support your favorite teams on Facebook; in this post we’ll look at how you and your friends express your fandom and what that says about the team you love.

1 Comment

Filed under Uncategorized

Pipes in R

The other day someone posted a link to this python package which provides a bash-style pipe operator to manipulate streams through a series of transformers. It seemed like a cool and powerful way of doing the usual data pre-processing / munging I often do in python.

But what about R? I also do a lot of processing in R and to me this pipe metaphor also seemed like a natural way of iterating over data frames. So the other day I set about trying to implement an R-thonic pipe operator and about 50 lines later I succeeded. It’s actually more robust and featureful than what I’ll describe below, but even in these simple use cases I can see it making manipulating data much easier.

Read more here: http://www.facebook.com/notes/jonathan-chang/pipes-in-r/10150174062816212

6 Comments

Filed under Uncategorized

Some quick updates

It was mentioned to me at NIPS that not everyone is on Facebook all the time and so it behooves me to post a few links here of some stuff that’s happened over the past few months. I’ll be better about cross-posting in the future, I promise!

  • As a result of a lunchtime conversation, I built a site, http://eqn.me/ which quickly turns latex into a linkable image, like this:
  • During the US election we put up a little widget that allowed users to express whether or not they voted. I wrote up a little blog post analyzing the results of those clicks here. Here’s a teaser pic:
  • My manager, Cameron Marlow, got a shout out in the New York Times magazine (albeit with some awkward phrasing =D).
  • Brendan O’Connor joined us this past summer and did some awesome work understanding the relationships between concepts as expressed on our page graph. I always get a kick out of this plot he made:
  • Sometimes people like to ask what I’ve been working on. Among other things, for the past few months I’ve been helping out on Facebook Places, and not just the promo video.

I’m probably forgetting a bunch of other stuff that’s happened this fall.

5 Comments

Filed under Uncategorized

A new home for Facebook data team publications

Brendan (who will be joining us this summer, natch!) pointed out yesterday that we don’t have a repository for the papers we’ve published here at Facebook. We moved fast. Now you can find them by clicking on the “Papers” tab of the Facebook Data page. Happy reading everyone!

Leave a comment

Filed under Uncategorized

Oh god, now there’s another video of me online

Recently I got to participate on a panel / give a talk as a part of the NAE Seattle Grand Challenges Summit. Let me thank Ed Lazowska for putting together such a great panel — Alon Halevy, Larry Smarr and Catharine van Ingen. I think I got a contact high just from being around such awesome researchers.

Anyhow, a video has surfaced of my talk. I would recommend against watching it, unless you want to see me nebbish my way through a five minute talk.

There’s also some more coverage here.

1 Comment

Filed under Uncategorized

Slides from some recent talks

Recently I had the honor of being invited to give a couple of talks in the Boston area. One at NESCAI and one at NESS. I had a great time and the feedback from the audiences was awesome. A shout out to Jeff of search engine cafe is in order. I also want to especially thank David/Sameer and Edo for inviting me and for putting together such great programs!

I have uploaded the slides for these talks here.

I’m also going to be on a panel for NAE’s Grand Challenges Summit next Monday. If you’re going to be in the Seattle area, stop by and say hi!

1 Comment

Filed under Uncategorized