i am a senior research scientist at microsoft research in new york city, where my work in the area of computational social science involves applications of statistics and machine learning to large-scale social data. i was previously a member of the social dynamics group at yahoo! research. i received my ph.d. from columbia university's physics department where i am an adjunct professor in the applied math department. please see my resume for more project and background information.
this site serves several purposes, from presenting and organizing my current research and teaching efforts to publishing code and tips that i hope others will find useful.
i bookmark lots of references on pinboard, occasionally tweet things, post random tidbits on tumblr, and share photos on flickr.
my latest geek tips, also available on twitter, tumblr, or as plain text:
20.05.15.17. rstats: flatten each element of a list column to its own row with unnest http://bit.ly/2riSMcE
20.05.15.17. rstats: an alternative approach to ordering factors within facets in ggplot2 http://bit.ly/2riAatf
20.05.15.17. rstats: a hack to set custom factor orderings within each facet of a plot http://bit.ly/2rim3Uw
20.05.03.17. rstats: cowplot helps with publication-ready ggplot2 http://bit.ly/2pIsJxF (h/t @stefanmherzog)
20.02.25.17. git: use git log --diff-filter=D --summary to find deleted files http://bit.ly/2mhsNno