R-bloggers

Thanks to Alan Haynes and his excellent suggestions, I have spent some time improving the flowchart component of the Gmisc package. The result is not meant to be another decorative diagram tool. It is meant for the kind of figures … Continue reading →

EFA explores unknown factor structures while CFA tests a predefined model. Compare both methods side by side with R code using psych and lavaan — know which to use in your dissertation. EFAEFA explores unknown factor structures while CFA tests a predefined model. Compare both methods side by side with R ...

With the recent resignation announcement from United Kingdom (UK) Prime Minister Keir Starmer, there have been a flurry of people talking about how many UK prime ministers there have been in the past decade, short terms for prime ministers, and so on. ...

How to Perform PCA in R: A Step-by-Step Tutorial Using prcomp() To perform PCA in R, use the built-in prcomp() function: pca 1), or a cumulative variance threshold — this tutorial shows all three and where they disagree. PCA is not the same as Factor Analysis. The comparison table below explains exactly ...

The European Bioconductor Conference 2026 (EuroBioC2026) took place from June 3-5, 2026, in Turku, Finland. Hosted by the University of Turku and the Finnish Society for Bioinformatics at BioCity, the conference brought together the Bioconducto...

A Likert scale (pronounced LICK-ert, not "LIKE-ert") is a psychometric rating scale used in surveys and questionnaires to measure attitudes, opinions, and perceptions. Named after American social psychologist Rensis Likert, who developed it in 1932, it remains the most widely used approach to scaling responses in survey research today. Key Takeaways ...

{talib} is a new R package built on TA-Lib, which is now available on CRAN. The R-package is targeted at individuals and, perhaps, institutions who, in some form or the other, interacts with the financial markets using technical analysis. The library is built with minimal dependencies for long-term stability and ...

Snapshot testing is not just for screenshots. Capture console output, logs, data frames, errors, and whole data structures. Practices that keep snapshot tests trustworthy instead of brittle.

TheseusPlot is an R package that decomposes differences in a rate metric between two groups into subgroup-level contributions and visualizes the results as a “Theseus Plot”. For example, when a click-through rate, conversion rate, or retention r...

My client's supervisor had rejected Chapter 4 twice. Not because the data was bad — the field trial was clean, the yield measurements precise. The problem was the statistics. And until I looked at the file, the student had no idea what was actually wro...

Introduction: The Laboratorial Illusion In quantitative finance, Large Language Model (LLM) multi-agent systems are frequently celebrated for their theoretical intelligence. Financial data scientists spend months refining prompt semantics, building complex reasoning frameworks, and engineering multi-turn debate loops between specialized agent nodes. On paper—and within simulated environments—these networks demonstrate ...