Blog Archives

Tidyverse Tutorial

October 17, 2016
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Last week, I gave an overview of bunch of tidyverse packages (tibble, dplyr, tidyr, ggplot, readr, purrr) to the Davis R-Users’ Group. Here is that talk (and since videos don’t display everywhere this blog is syndicated, here is the YouTube link). ...

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useR! talk on teaching R

July 5, 2016
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Here is a video recording of my talk from useR! 2016 on teaching R. It’s nominally about teaching a lot of students in an intensive format, but I think almost everything translates to traditional classes. If for whatever reason this video isn’t working out for you, here is the source. This talk was just one in a great session....

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A Shiny app to help interpret GW-Degree estimates in ERGMs

June 26, 2016
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A Shiny app to help interpret GW-Degree estimates in ERGMs

Most researchers are misinterpreting geometrically weighted degree (GWD) estimates in exponential random graph models (ERGMs) of networks. By a 3:1 ratio papers cite positive estimates of GWD as indicative of a popularity or centralization force; in fact, positive estimates indicate dispersion of edges. Shiny app Here is a Shiny app that allows you to examine the effects of GWD parameter...

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ERGM Tutorial

May 10, 2016
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ERGM Tutorial

This was originally for a talk to the UC Davis Network Science group on using statnet to manage, visualize, and model networks with a focus on exponential random graph models (ERGM). I have cleaned it up a little so that it hopefully stands on its own. If anything is unclear, feel free to leave questions in the comments.

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Playing with Twitter Data

April 28, 2016
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Playing with Twitter Data

Last Friday, the Institute for Social Sciences hosted a great one-day conference on various aspects of the reproducability crisis, Making Social Science Transparent. It was the first time I’ve done much tweeting during an event like this, and while it felt a little silly, it was also fun, it was nice to hear what was resonating with...

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Teaching R to 200 students in a week

September 19, 2015
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Teaching R to 200 students in a week

I just taught a week-long “R Bootcamp” to 200 R newbies. It went quite well, and I thought it would be valuable to jot down some thoughts on what worked and what I might change if doing it again. The course design and my approach to teaching scientific computing in general have been deeply shaped by Greg Wilson and...

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What we’re reading — and how it ties us together

March 28, 2015
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What we’re reading — and how it ties us together

tl;dr: Network of an interdisciplinary environmental social science lab as tied together by the journals we read. A few key journals, especially Social Networks, hold us together. R code follows. The Center for Environmental Policy and Behavior, my grad lab, is remarkably interdisciplinary. For some sense of our breadth, consider that our nine core graduate students represent five different...

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dplyr: Data manipulation in R made easy

October 6, 2014
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Here is the dplyr talk that I recently gave to the Davis R Users’ Group. dplyr is an R library that does basic data manipulation extremely well. It is designed to make the data handling tasks that we all do over and over as easy as possible. It produces highly readable syntax that is low cognitive overhead to write....

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