R-bloggers

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...

The 1.4.0 release of maestro is out, and with it comes the ability to record custom metrics from your pipelines. Execution time and success/failure were already tracked, but there was no good way to answer questions like “how many rows did ...

Flow cytometry researchers have a growing collection of R and Bioconductor tools available to them. But for someone who is comfortable working with cytometry data and has little programming experience, knowing where to begin can be difficult. T...

When we have a multi-trait table of data, we might be interested in investigating variability structure and the reciprocal relationships (whether causal or non-causal) among variables. For example, let’s consider the ‘mtcars’ dataset, shown belo...

I recently updated nycdogs, a data package for R that I originally made for teaching purposes. It bundles up New York City’s dog licensing and dog bite datasets into an R package. The data is already provided by the city in a directly usable way ...