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:
18.104.22.168. rstats: be careful of dropped zero counts with dplyr http://bit.ly/2S7j13b from @kjhealy
22.214.171.124. rstats: be careful of dropped zero counts with dplyr http://bit.ly/2S7j13b from @jkhealy
126.96.36.199. rstats: quick and easy lollipop charts in ggplot with geom_point and geom_segment http://bit.ly/2S8fLof
188.8.131.52. rstats: spread a dataframe from long to wide when you have multiple values http://bit.ly/2Dnz34P (from @kjhealy)
184.108.40.206. shell: use tail -r to reverse the lines of a file http://bit.ly/2RitkRz