Introduction Today we are talking about structural equation models (SEM). There are lots of synonyms, sub-categories, and adjacent techniques that you may have heard before–covariance structure analysis, linear structural relations, […]
Introduction Analyzing qualitative data is challenging. Such analyses are even more difficult when the topic is controversial and the results will drive important policy decisions. This post explores AI methods […]
When I first developed the method to estimate canopy metrics from smartphone spherical panoramas, I used a somewhat convoluted workflow involving command line image manipulation, a plugin for ImageJ to […]
An article I wrote about an expedition to collect wood frogs in the Alaska Arctic is now online at Alaska Magazine. I’ve included the teaser below, but check out the […]
Every once in a while, I come across a plot form that is not in my ggplot repertoire. For example, I occasionally want to make a funnel plot in my […]
Last week, I attended a talk at our local Yale data science group by my friend Matteo in which he presented an overview of ggplot2. During the questions after the […]
I recently needed to learn text mining for a project at work. I generally learn more quickly with a real-world project. So, I turned to a topic I love: Wilderness, […]
Scroll to the end for the photo gallery. — I originally wrote this post for the Sitka Conservation Society‘s website in 2014. This trip was part of the Stika Community […]
The other day, I wanted to tweet out a map showing the distribution of some wood frog tissue samples compared to the entire range of the species. I’m not much […]
A short recipe for adventurous field science Take me to the photos! Step 1: Come up with a hair-brained scheme. My labmate Yara and I had been dreaming up the […]