How to Test R Code That Uses LLMs, APIs, or Databases
A Practical Guide to Faking External Dependencies in R for Fast, Reliable Tests. [Read more...]
Animated Maps with {ggplot2} and {gganimate}
In this blog post, we are going to use data from the
{gapminder}
R package, along with global spatial boundaries from
‘opendatasoft’.
We are going to plot the life expectancy of each country in the Americas
and animate it to see the changes from ...
R Girls Open Event 2025
Forwards members Heather Turner and Ella Kaye were invited to attend the “Data Science for Girls” open event hosted by R-Girls at Green Oak Academy, Birmingham, UK on July 9 2025. They joined other guests from Ascent and Health Data Research UK...
June 2025 Top 40 New CRAN Packages
In June, one hundred twenty-three new packages made it to CRAN. Here are my Top 40 picks in twenty-one categories: AI, Chess, Computational Methods, Data, Decision Analysis, Ecology, Epidemiology, Finance, Genomics, Linguistics, Machine Learning...
What’s R vector, Victor?
In this week’s episode of the “Hidden Monads in R” series,
I’ll explore the vector aspect of R data structures, and see how the flatmap
operation can be quite useful.
Flatmap? Aren’t all maps flat?
The Nobel Prize organis...
Health Technology notes: Copilot tips and guidance
1. Introduction
1.1. The use of AI agents and the case for “prompt” choices
We introduced the use of the AI pair programmer, Copilot, while working with tidyverse. In this post, we walk the reader through the fundamental driver of successfully...
How to Write Cucumber Specifications the Right Way: From App Description to Scenarios
Adding Cucumber specifications to an existing application? Learn how to write Gherkin scenarios that focus on user behavior, not implementation details. Use AI to iterate faster. [Read more...]
Refactoring Cucumber and Playwright Acceptance Tests with GitHub Copilot
Given a set of existing Cucumber and Playwright acceptance tests, I asked Copilot to refactor them according to best practices for step organization and anti-patterns. [Read more...]
Efficient R – How to write faster code workshop
Join our workshop on Efficient R – How to write faster code, which is a part of our workshops for Ukraine series! Here’s some more info: Title: Efficient R – How to write faster code Date: Thursday, August 28th, 18:00 – 20:00 CEST (Rome, Berlin, Paris timezone) Speaker: Selina Baldauf, Selina is a theoretical ... [Read more...]
Can Juliet manage without Romeo? How much she should spend, save, and invest to achieve that?
Meet Juliet
Juliet just turned 20 and is ready to start her adult life. She’s landed a stable, well-paid job and her new journey begins. This time, life unfolds without Romeo. Think she can’t handle it? You might be surprised.
Juliet feels anxious about her future. Each month she ...
Part IV – Using R in Excel – Calling Python
Introduction
In the last post in this series I am going to look at calling Python from R. Even though Excel now provides a means of calling Python scripts directly, using the =PY() formula in a worksheet, there are still occasions when it is beneficial...
Part III – Using R in Excel – Forecasting
Introduction
We have already seen how to obtain descriptive statistics in Part I and how to use lm() in Part II. In this part (Part III) of the series we will look at using R in Excel to perform forecasting and time series analysis.
In the previous tw...
Part II – Using R in Excel – Linear Regression
Introduction
In the first part of this series, I looked at using R in Excel to obtain descriptive statistics. In this second part of the series I am going to look at using R in Excel to perform linear regression, specifically using the lm() function. l...
Part I – Using R in Excel – Descriptive Statistics
Introduction
The purpose of this series of posts is to demonstrate some use-cases for R in Excel using the ExcelRAddIn component (disclaimer: I am the developer of this add-in: ExcelRAddIn). The fundamental rationale for the add-in is that it allows ac...
Shiny in Production 2025: R Dev Day
Do you use R? Would you like to play a part in sustaining it? Find out about the R Dev Day that is returning as a satellite event to Shiny in Production 2025. This post will answer questions you may have, such as: “Do I need to be an R guru...
3 Reasons Blocking You From Doing Automated Testing
Get them out of your way to start testing your code effectively. [Read more...]
Let’s talk about NA-s!
ARTHUR: Well, what is it you want?
HEAD KNIGHT: We want… a paste function that can deal with NA-s!
A language for statistical computing clearly needs to be able to deal with
missing values, and R has various ways to do so. I will briefly go th...
Tidyverse with GitHub Copilot for Healthcare Analytics – Part 2
1. Introduction and recap
Healthcare analytics offers significant benefits to a wide range of stakeholders, including health administrators, organizations, and most importantly, doctors, nurses, and healthcare workers.
In the first part of this...
rOpenSci News Digest, July 2025
Dear rOpenSci friends, it’s time for our monthly news roundup! You can read this post on our blog. Now let’s dive into the activity at and around rOpenSci!
rOpenSci HQ
Open Science with a Latin American Identity: Meet the New Cohort of... [Read more...]
Trend-Anomaly Analysis of U.S. Federal Budget Balance
According to the Trend-Anomaly chart, after the liberation day tariffs, the U.S. Federal Budget Balance has recovered from the extremely high level deficit. Source code:
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