Monthly Archives: October 2019

Renaming all files in a folder in R

October 28, 2019
By
Renaming all files in a folder in R

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

Read more »

Illuminating the Illuminated Part Two: Ipsa Scientia Potestas Est

October 28, 2019
By
Illuminating the Illuminated Part Two: Ipsa Scientia Potestas Est

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,...

Read more »

Data Science – A New Hope for Good

October 28, 2019
By

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...

Read more »

Bojack the Data Scientist

October 28, 2019
By
Bojack the Data Scientist

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...

Read more »

Reconstructing Images Using PCA

October 27, 2019
By
Reconstructing Images Using PCA

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,...

Read more »

Projects chapter of ‘evidence-based software engineering’ reworked

October 27, 2019
By

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

Read more »

Le Monde puzzle [#1115]

October 27, 2019
By
Le Monde puzzle [#1115]

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

Read more »

Climbing Mt. Whitney with web browser automation and R

October 27, 2019
By
Climbing Mt. Whitney with web browser automation and R

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...

Read more »

New Introduction to rquery

October 27, 2019
By

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...

Read more »

littler 0.3.9: More nice new features

October 27, 2019
By
littler 0.3.9: More nice new features

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...

Read more »

Search R-bloggers

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)