The high cost of split R-hat

2026-07-02
This post is by Bob. I’ve been thinking a lot lately about R-hat given that I’m using it for online converging monitoring in our new Walnuts implementation. In that setting, where I use Welford accumulators to update R-hat estimates every … Continue reading → …

Guess who’s getting the big-money donations in the Maine U.S. Senate race?

2026-07-02
Just in time for July 4th, Tom Ferguson, Paul Jorgensen, Matthias Lalisse, and Jie Chen share the above graph and write: What can one Senate race reveal about the hidden machinery of American politics? In Maine, donor patterns expose how … Continue reading → …

A New Guide: Organizing Events for First-time Contributors

2026-07-02

Making your first contribution to open source can be both empowering and yet very intimidating.
– rOpenSci FTC Guide

Last year we were grateful to receive funding from NumFOCUS1 to organize a series of events designed to reduce barriers restri…

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FOSS Tools for Lazy Editors

2026-07-02

I recently had the opportunity to learn what the term “Nerd Sniping” meant.
Maëlle pointed out a conversation on the rOpenSci Slack about something called Vale, meant for text linting.
I’d seen the comment, but honestly hadn’t…

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