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.

latest tips

my latest geek tips, also available on twitter, tumblr, or as plain text:

apache applescript awk bash bibtex c c++ consumer css cu cvs debian emacs excel firefox flickr gcc gentoo git gmail google grammar graphviz hadoop html idvd imagemagick iphone iphoto ipod irc itunes java javascript juypter keynote latex lifehack linux mac macosx matlab meta mobile mturk mysql network networking perl php python quicktime razr rss rstats rsync ruby safari search sed sge shell silverlight sms sql ssh svn test trac treo unix video windows word wordpress x11 xml rstats: format axes breaks with exponents in ggplot2 http://bit.ly/2zwB8aI git: move a directory from one branch to another http://bit.ly/2iBlgM1 rstats: use predict(model, new_data, re.form=NA) to predict from fixed effects only in an hlm http://bit.ly/2ipbwo2 rstats: use pull to cleanly extract one tibble column as a vector http://bit.ly/2zmshaj shell: use units to convert between or compute with different physical units http://bit.ly/2wXIgP9 (h/t @dggoldst)