Joshua M. Rosenberg, Ph.D., is Assistant Professor of STEM Education at the University of Tennessee, Knoxville. In earlier posts, we shared how we wrote Data Science in Education Using R as an open book (Post 1, Post 2). In this post, we describe what we consider to be the open-source authorship ...

The weekly puzzle from Le Monde is a leaking variant on an old puzzle: Three buckets have capacities of 8, 5 and 3 litres, respectively. At the start of the game, the 8 litre bucket is full and both others are empty. Aiming at reaching exactly 4 litres in one bucket, water is transferred between […]

e-Rum2020 conference connects many hundreds of R enthusiasts in virtual space! With the Covid-19 pandemic turning plans upside down on a global scale, what should have happened at the end of May in Milano as eRum2020 had to be converted into a virtu...

When working with R Markdown’s HTML output type, it’s possible to add a custom style to your output by passing in a CSS style sheet to the YAML header like this:

output:
  html_document:
    css: "my-style-sheet.css"

To use CSS effectively, it’s critical to understand how to specificy which selectors one wishes ...

Classification models I would suggest you read section 5.1 of Introduction to Statistical Learning to get a full treatment of this topic In classification methods, we are typically interested in using some observed characteristics of a case to predict a binary categorical outcome. This can be extended to a multi-category outcome, ...

Lately I’ve been publishing screencasts demonstrating how to use the tidymodels framework, from first steps in modeling to how to evaluate complex models. Today’s screencast focuses on using bootstrap resampling with this week’s #TidyTuesday dataset from the Claremont Run Project about issues of the comic book series ...

Jackie Wong, Jon Forster (Warwick) and Peter Smith have just published a paper in Statistics & Computing on bridge sampling bias and improvement by splitting. “… known to be asymptotically unbiased, bridge sampling technique produces biased estimates in practical usage for small to moderate sample sizes (…) the estimator yields positive bias that ...

On a late evening, I was scrolling through Reddit and came across a news article about “Why Bill Gates wants us all to get vaccinated?”. The news site looked legitimate. I was half way through the article and saw quite a few grammatical errors. Me being lurker, I switched to ...

I’m beyond excited to introduce modeltime, a new time series forecasting package designed to speed up model evaluation, selection, and forecasting. modeltime does this by integrating the tidymodels machine learning ecosystem of packages into a streamlined workflow for tidyverse forecasting. Follow this article to get started with modeltime. If ...

Suppose you have an applocation running on a Shiny server and you want to add HTTP authentication so that it’s only accessible via a username and password. This can be done using NGINX. Test Shiny Server The Shiny server should be accessible at ...