R-bloggers

This blog post is about me trying to make a better version of an existing diagram that I think is important, but difficult to read in the version it keeps popping up on my Bluesky feed. Robin J Brooks of the Brookings Institution has been using a usef...

What would happen if we peeled the Earth like an orange? The interrupted Goode homolosine projection gives us something close to that! This equal-area projection preserves relative areas while splitting the world map into lobes. Add a few shades of orange and our world is ready to peel.

Following this previous post and this discussion on Mastodon, I wrote a function that wraps a combination of functions from the ‘terra’ package to project a SpatRaster or SpatVector layer while automatically centering the projection on that layer, to minimize … Continue reading →

When forecasting high-volatility financial assets like Bitcoin (BTC-USD), standard point-prediction models—whether classical ARIMA or deep neural networks—often fall short. A point estimate tells you where the model expects the price to go, but it completely ignores market regime shifts and changing risk levels. In this article, we construct ...

1 Documentation was always the point TKCat (Tailored Knowledge Catalog) is built on a simple idea: a knowledge resource is more than a set of tables. In TKCat, each resource is a modeled database (MDB) that contains: a general description of t...

REX d’une firme minimale : auditer sa veille IA, protéger ses notes et mesurer les limites du contrôle humain.

I often need to get mainland from country / administrative region polygons, so I finally decided to write a function to help automate it. It selects the N largest feature(s) in a polygons or lines map. Here’s the code: The … Continue reading →

For the life of me, I couldn't get Ctrl+Shift+M to work for inserting pipes (|__) when editing a Quarto document in Positron visual mode. After countless hours fiddling with keybindings.json, I developed a functional, but obtuse workaround for Windows. It's not pretty, but it works. This post outlines ...

This post explores the impact of the split_prob parameter in the ahead::conformalize() function on the resulting prediction intervals.

Zhenguo Zhang's Blog https://fortune9.netlify.app/2026/10/16/statistics-collinearity-in-regression/ - library(knitr) library(ggplot2) library(dplyr) library(tidyr) library(broom) Problem When performing regression analysis, you may encounter two or ...

If you plan to learn R or Python in the new year, book before the end of November. Our spring 2027 data science training courses run from January to June, and early bird pricing on the first one ends on 29 November. There are 22 courses on the sc...

The Model Context Protocol (MCP) is quietly becoming one of the most useful ideas in AI tooling. Here, we describe what MCP is, why it matters, and how to build an MCP server yourself. MCP is a standard way to link a Large Language Model (LLM) to the outside world. ...

One of the fundamental aims of field experiments is to explorare the relationships between several experimental traits, which have been recorded/measured altogheter for all the experimental units. For example, think about a genotype experiment w...