Entries Tagged as ‘Uncategorized’

March 8, 2010

R LDA package updated to version 1.2 and an ideal-point model for political blogs

I’ve been on a bit of a R tear lately. Today you should see a new version of the R lda package. This version has lots of fixes including a working mmsb demo with the latest version of ggplot2, corrected RTM code, improved likelihood reporting, better documentation, and much more. Grab it [...]

March 7, 2010

jjplot: Yet another plotting library for R

Those of you who follow this blog know that making (somewhat) pretty plots is an abiding interest of mine. Many of the plots I’ve made in the past were done using the great ggplot2 package. But recently Eytan Bakshy and I have been tinkering with our own plotting library, jjplot, as a playground [...]

January 24, 2010

Axl Rose by any other name…

In a post a while ago, I wondered how much info about the band one could glean just by looking at the name. I mean, shouldn’t it be obvious that a band named “Trauma” should be heavy metal?
This was the genesis of a collaboration between me and Matt Hoffman. We wanted to [...]

January 23, 2010

The cost of a sample

I once heard it on good authority that Gelman says you usually don’t need more than 12 samples. Well, as a result of a discussion with Sam Gershman (sorry Sam for not answering the actual question you asked!), I wondered if that was true; that is, if under reasonable assumptions it might be better [...]

December 17, 2009

How diverse is Facebook?

I’ve been doing some work on the topic, along with Lars, Cameron, and Itamar. Read more at http://www.facebook.com/note.php?note_id=205925658858