R-bloggers

1. Introduction & Theoretical Framework In modern electronic trading markets, algorithmic execution engines drive the vast majority of institutional order flows. Evaluating whether these independent, learning-driven trading algorithms behave competitively or tacitly coordinate has become a critical challenge for quantitative compliance, market microstructure design, and risk management. This technical article implements an ...

Learn to recognize problems in R test code that cause your test suite to pass while hiding real bugs. Detect those issues and start writing more trustworthy tests.

Three hundred seventy-six of the new packages submitted to CRAN in April were still there in mid-May. Here are my Top 40 picks in twenty-three categories: Actuarial Analysis, Archaeology, Biology, Causal Inference, Computational Methods, Ecology...

Zhenguo Zhang's Blog https://fortune9.netlify.app/2026/05/30/r-position-legend-inside-plot/ - By default, ggplot2 places the legend outside the plot area (usually on the right). However, sometimes you may want to move the legend inside the plot to sa...

Join us in Turku The Tidyomics community is organising a hackathon during the pre-conference programme of EuroBioC2026 in Turku, Finland. The hackathon will take place on June 1-2, 2026, ahead of the main EuroBioC2026 conference on June 3-5, 20...

I’ve been using Unix and Linux systems for nearly 20 years. When I found myself with a Windows laptop for a while I felt lost and quickly installed Windows Subsystem for Linux. And yet the number of commands I know and use regularly is surprisingly short: cd, ls, rm, pwd, ...

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 15 Years of rOpenSci, and we’re just getting started 🎉 This y...

Reposted from the original at https://blog.stephenturner.us/p/ctrlvee-extract-external-r-code-insert-inline-positron-rstudio-addin. Ever find yourself looking through a pkgdown page or a Quarto book, copying and pasting code chunks from your brow...

Zhenguo Zhang's Blog https://fortune9.netlify.app/2026/05/22/r-how-to-use-ggpattern/ - Adding patterns to plots is a great way to improve accessibility (making plots colorblind-friendly) and to add an extra dimension of information. The ggpattern pac...

Prediction Intervals for Tabular Regression in Python and R via Conformalized TabICL; comparison with RidgeCV

The manifold hypothesis, the idea that real-world high-dimensional data concentrates near a low-dimensional curved subspace, is foundational to modern machine learning. Many popular manifold learning methods such as UMAP, t-SNE, Isomap, and diff...