Fish Abundance in a Stream Network

Mapping Abundance in Streams in R

I haven’t worked with raster or spatial polygon data in R much before, but I want to create maps to show the results of a spatiotemporal model. Specifically, I want to depict the changes in abundance of fish in a stream network over time and space. I decided to play around with various packages for…

Lags and Moving Means in dplyr

I’ve been a big fan of dplyr from the start. While learning any new package can be frustrating, overall dplyr is fast and consistent. The Nonstandard Evaluation (see vignette(“nse”) for details) is both a blessing and a curse, overall dply is making life with big(ish) data much easier. The rapid development makes it a challenge…

dplyr is great…but

I have been loving Hadley Wickham’s new dplyr package for R. It creates a relatively small number of verbs to quickly and easily manipulate data. It is generally as fast as data.table but unless you’re already very familiar with data.table the syntax is much easier. There are a number of great introductions and tutorials, which…

computing

Teaching Scientific Computing: Peer Review

This post is going out on a bit of a limb because I am not familiar with the pedagogical literature relating to teaching scientific computing. As such, I can only speak from my very limited experience. I’ve taken a couple short courses on scientific computing, but the only formal full-semester course I’ve taken was Introduction…