I hate the way files are run in a camera. While it was cool to learn for this post that DSCN stands for “Digital Still Capture – Nikon,” it means nothing to me! For this post, I will be renaming the files that I took from Worden Ledges into a more “human-readable” name. Ready to
In the previous post in this series we coyly unveiled the tantalising mysteries of the Voynich Manuscript: an early 15th century text written in an unknown alphabet, filled with compelling illustrations of plants, humans, astronomical charts, and less easily-identifiable entities. Stretching back into the murky history of the Voynich Manuscript,...
Good triumphing over evil in the end is the stuff of every good fairy tale or Hollywood storyline, but in real life, as we all know, it’s usually the tales of political doom and gloom across the world that dominate our screens with stories of good remaining well away from the spotlight. Good, it seems, does not make for...
New Season of Bojack Horseman – NO SPOILERS! A new season of my favorite show, Bojack Horseman, just dropped on Netflix, and I have absolutely zero time to sit down and watch it. However, in some magical way there was time for me to write this blog post and do this analysis. What analysis you ... The post...
A decade or more ago I read a nice worked example from the political scientist Simon Jackman demonstrating how to do Principal Components Analysis. PCA is one of the basic techniques for reducing data with multiple dimensions to some much smaller subset that nevertheless represents or condenses the information we have in a useful way. In a PCA approach,...
The Projects chapter of my evidence-based software engineering book has been reworked; draft pdf available here. A lot of developers spend their time working on projects, and there ought to be loads of data available. But, as we all know, few companies measure anything, and fewer hang on to the data. Every now and again
![Le Monde puzzle [#1115]](https://xianblog.files.wordpress.com/2015/10/lemondapari.jpeg?w=450&h=299&%23038;zoom=2)
A two-person game as Le weekly Monde current mathematical puzzle: Two players Amaruq and Atiqtalik are in a game with n tokens where Amaruq chooses a number 1
Mount Whitney is the tallest mountain in the contiguous United States and you need a permit to climb it. These permits are limited. But from time to time, somebody will return his permit. It will show up on the permit website recreation.cov. I wanted to get one of those and will tell you how. A friend of mine had a time...
Introduction rquery is a data wrangling system designed to express complex data manipulation as a series of simple data transforms. This is in the spirit of R’s base::transform(), or dplyr’s dplyr::mutate() and uses a pipe in the style popularized in R with magrittr. The operators themselves follow the selections in Codd’s relational algebra, with the … Continue reading New...
The tenth release of littler as a CRAN package is now available, following in the thirteen-ish year history as a package started by Jeff in 2006, and joined by me a few weeks later. littler is the first command-line interface for R as it predates Rscript. It allows for piping as well for shebang scripting via #!, uses command-line arguments...
