Circular statistics deals with analysis of measurements made using a circular scale, e.g., minutes past the hour, days of the week. Wikipedia uses the term directional statistics, the traditional use being measurements of angles, e.g., wind direction. Package support for circular statistics is rather thin on the ground. ...

Running into errors and warnings is a completely normal part of programming – even the best of the best can count on it happening daily! Getting comfortable with what the errors mean and how to find the solution is part of your learning journey. Here’s a checklist (pdf /jpg) with … ...

If you haven’t, you should read this first. This is part two. Speedrunning is the… hrm… - sport? art? - of playing games from start to finish as fast as possible. Speedrunning requires an insane amount of knowledge of the game being played, as well as an enourmous amount ...

When writing an R package I usually write a README.Rmd file that I render to README.md. I use {pkgdown} to then create documentation. I run the last step via CI, so I never need to think about it. The problem is that I regularly forget to process the ...

By Xiaotong Ding (Claire), With Greg Page A practical tool that enables a modeler to remove non-informative data points during the variable selection process of data modeling In this article, we will introduce a powerful function called ‘nearZeroVar()’. This function, which comes from the caret package, is a practical tool ...

The climate of a place is usually presented through climographs that combine monthly precipitation and temperature in a single chart. However, it is also interesting to visualize the climate on a daily scale showing the thermal amplitude and the daily average temperature. To do this, the averages for each day ...

The past few weeks I have been exploring the speed of R. It started with this video in which I explained that R is not necessarily slower than any other interpreted language, as long as you’re using the built-in, optimized functions. However should you write your own implementation of ...

My PhD student, Congzheng Liu (co-supervised with Adam Letchford) has written a paper, entitled “Newsvendor Problems: An Integrated Method for Estimation and Optimisation“. This paper has recently been published in EJOR. In this paper we build upon the existing Ban & Rudin (2019) approach for newsvendor problem, showing that in case of ...

Bond duration is a basic building block for bond portfolio management and asset-liability management (ALM). This post explains the meaning of duration and calculation of this risk measures by using Excel and R. Instead of using another full-fledged ...

How to create appropriate data visualizations using tidycharts package.There is a wide range of R packages created for data visualization, but still, something was lacking. There was no simple and easily accessible way to create clean and transparent c...

A small new feature added to {emayili}: the ability to interpolate content into the email message body. Load Package Load the {emayili} package and create a message skeleton. library(emayili) options( # Always print message body. envelope_details = TRUE, # Print message from pipeline. envelope_invisible = FALSE ) # Create a message skeleton. # email

This post is part of a series of technotes about r-universe, a new umbrella project by rOpenSci under which we experiment with various ideas for improving publication and discovery of research software in R. As the project evolves, we will post updates to document features and technical details. For more ...

Want to merge pdf files, but keep bookmarks? Read on...

Do you know that feeling of excitement when you open your favorite Shiny app? You have an important job to do, possibly with a tight deadline, but that Shiny dashboard has all the tools you need. They are organized, intuitive to use, and help you accomplish your goals fast and ...

ShinyProxy is a free and open-source platform for hosting containerized applications with enterprise features.