Hadley Wickham
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hadley.nz
Hadley Wickham
@hadley.nz
14K followers 220 following 710 posts
R, data, 🐕, 🍸, 🌈. He/him.
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Reposted by Hadley Wickham
davisvaughan.bsky.social
I sent 200 pull requests using Claude Code and wrote about the experience. It's pretty wild!

For dplyr releases, we send a PR any time we break an #rstats package. This release advances a lot of deprecated functions, triggering issues in many old packages!

blog.davisvaughan.com/posts/2026-0...
Semi-automating 200 Pull Requests with Claude Code – Davis Vaughan
blog.davisvaughan.com
January 12, 2026 at 1:42 PM
Reposted by Hadley Wickham
dariia.bsky.social
I am very happy to announce that I will be a keynote speaker at useR!2026 in Warsaw!
Hope to see many incredible members of #RStats community in person there 😀
user-conf.bsky.social useR! - The R User Conference @user-conf.bsky.social · 3d
We are honored to announce Dariia Mykhailyshyna (@dariia.bsky.social) as a Keynote for useR! 2026 in Warsaw!

A postdoctoral researcher at the Kyiv School of Economics and a recent PhD graduate from the University of Bologna, Dariia has been an avid R user for seven years.
user2026.r-project.org
A poster for the "USER! 2026 CONFERENCE WARSAW," which is scheduled for "6th-9th JULY 2026" at "WARSAW SCHOOL OF ECONOMICS & ONLINE." The poster announces "Keynote Speaker Dariia Mykhailyshyna." On the right is a photo of Dariia Mykhailyshyna, a woman with brown hair wearing glasses and a white t-shirt with "KYIV" text and an illustration of a building. Below the conference details are four colored squares (blue, yellow, orange, purple) showing a progression of a fractal geometric pattern, starting from a single square.
January 10, 2026 at 7:11 PM
Reposted by Hadley Wickham
libbyheeren.bsky.social
For @hadley.nz, because, yes, the Accounts and Settings buttons totally do move when you do this! They go up to the top right of #Positron.

See my original post below where I show how to right click next to the activity name you're in (like next to "Explorer") to change the Activity Bar Position
Screenshot of Positron showing that, when the Activity Bar is in the default Left position, the buttons to access Accounts and Settings are at the bottom left of the screen. Screenshot of Positron showing that, when the Activity Bar is in the Top position, the buttons to access Accounts and Settings are at the top right of the screen in the very corner.
January 10, 2026 at 6:02 PM
Reposted by Hadley Wickham
libbyheeren.bsky.social
This is the most elite change in #Positron, it's so calming.

#rstats #python #databs
Side by side views of the Positron. The left side has the activity bar on the left in the default position. The right side has the activity bar in the top position. Screenshot of the Positron IDE showing that the Activity Bar moved from the default position on the left side to the top where it's much smaller. A right-click menu is open next to the “Explorer” label, with the option Activity Bar Position → Top selected. Annotations highlight where to right-click, next to the word Explorer, then choose Activity Bar Position, and then choose Top.
January 10, 2026 at 6:08 AM
Reposted by Hadley Wickham
danoehm.bsky.social
{survivoR} has been updated on CRAN with complete Season 49 data and updated Season 50 cast. Any issues, let me know. Otherwise, it's a good time for pre-S50 analysis.

#Survivor #Rstats

gradientdescending.com/survivor-49-...
Survivor 49 is now in 📦{survivoR} - Dan Oehm | Gradient Descending
Survivor 49 has wrapped up and has been added to the {survivoR} package. It is available on If you find […]
gradientdescending.com
January 9, 2026 at 10:28 PM
Reposted by Hadley Wickham
smachlis.bsky.social
Soooo if you use #RStats and Claude Code:
R console: install.packages("btw")
Terminal: claude mcp add -s "user" r-btw -- Rscript -e "btw::btw_mcp_server()"
And now Claude Code can answer questions about ANY R package installed on your system.
January 7, 2026 at 3:00 AM
Reposted by Hadley Wickham
grimalkina.bsky.social
this does help
The first, and most important, thing to know is that it’s not just you. Nearly everyone in tech I have this conversation with feels very isolated about it, and they’re often embarrassed or ashamed to discuss it. They think that everyone else who has a job in tech is happy or comfortable at their current employers, or that the other people looking for work are getting calls back or are being offered interviews in response to their job applications. But I’m here to tell you: it is grim right now. About as bad as I’ve seen. And I’ve been around a long time.
January 5, 2026 at 9:41 PM
Reposted by Hadley Wickham
danielroelfs.com
✨New blog post✨

I break down the beautiful data visualizations from a New America report (cowritten by @oscarp.bsky.social) and try to recreate them in R using ggplot2.

danielroelfs.com/posts/new-am...
Daniel Roelfs
Learning data viz from the best: New America and Datawrapper
danielroelfs.com
January 4, 2026 at 8:38 PM
Reposted by Hadley Wickham
tah-sci.com
Hivemind question: Palmer Penguins is doing great work avoiding overuse of Fisher's iris data. What other "dataset substitutions" do you like? Or just generally other cool, real, open datasets that are good for teaching because established methods work pretty well on them?
January 4, 2026 at 3:43 PM
Reposted by Hadley Wickham
jakubnowosad.com
Introducing gdalcli by Andrew Brown -- an R frontend to GDAL’s unified CLI (≥3.11) 🌐

Compose and execute GDAL workflows with pipe-friendly functions.

Learn more: github.com/brownag/gdal...

#RStats #GDAL #Geospatial #OpenSource #RSpatial
GitHub - brownag/gdalcli: An R Frontend for the GDAL CLI
An R Frontend for the GDAL CLI. Contribute to brownag/gdalcli development by creating an account on GitHub.
github.com
January 4, 2026 at 3:01 PM
Reposted by Hadley Wickham
datavisfriendly.bsky.social
ggCheysson is based on colors, patterns of these _Albums_ maps collected by @infowetrust.com
Cheysson fonts by @kennethfield.bsky.social
January 2, 2026 at 2:19 AM
Reposted by Hadley Wickham
kylewalker.bsky.social
2025 was a massive year for me as an R developer.

This past year I've branched out and focused on bringing interfaces to some of the most exciting geospatial technologies to the R community.

Here's a summary:
December 31, 2025 at 5:30 PM
Reposted by Hadley Wickham
emilyriederer.bsky.social
Last 2025 post, on @python.org & @carpentries.carpentries.org values, a great @posit.co conf session feat @mchow.com @richmeister.bsky.social @davisvaughan.bsky.social, the magic of #rstats #python dev cultures sharing best practices, and random #rstats history

www.emilyriederer.com/post/py-rgo-...
R + Python: From polyglot to crosspolination | Emily Riederer
A combined reflection on 2025, posit::conf(2025), and the necessity of diversity in open source
www.emilyriederer.com
December 30, 2025 at 9:55 PM
Reposted by Hadley Wickham
joshpersi.bsky.social
Hey folks! I built a Canadian trade database to practice what I'm learning about DuckDB. The database includes all Canadian imports and exports from 1988 to present as per Statistics Canada. Here's a blog post I wrote with more details:

joshpersi.github.io/blog/posts/0...

#rstats #duckdb
A Canadian trade database built with DuckDB – Josh Persi
joshpersi.github.io
December 28, 2025 at 9:03 PM
Reposted by Hadley Wickham
aman.bh
Rhea and I have been tracking our @nytimes.com word games (Wordle, Connections and the Mini) for the past two years. I decided to analyze our 4,200 gameplays with #rstats to determine a winner and made some festively embroidered charts with ggplot. Have a read. #dataviz

aman.bh/blog/2025/tw...
A digital illustration styled to look like an embroidered fabric patch or cross-stitch. The text reads 'TWO YEARS OF WORD GAMES' in the center, with '2025' at the bottom and 'AMAN V. RHEA' in the top right. The background is a checkered pattern of colored squares (green, yellow, gray, purple, and blue), mimicking the color palettes of Wordle and Connections. A scatter plot titled 'CROSSWORD TIMES' comparing daily Mini Crossword completion times over two years. The chart uses a pixelated aesthetic. Aman's data (left, in blue) shows a widely scattered distribution with a trend line hovering between 1 and 1.5 minutes, and includes a high outlier labeled 'Legendary bad Saturday.' Rhea's data (right, in red) is much more tightly clustered near the bottom, with a trend line consistently sitting around or below the 1-minute mark. A waffle chart titled 'WINS IN A DAY' displays the percentage of days when each player achieved 0, 1, 2, or 3 wins (a 'Sweep'). Aman's grid is dominated by '1 win' (yellow) and '0 wins' (beige), with only a few red squares representing a Sweep. Rhea's grid is much more colorful, featuring large blocks of '2 wins' (green) and a significant number of 'Sweep' (red) squares. An infographic titled 'CONNECTIONS: Who flops, clutches, or cracks purple?'. A table shows Aman has a slightly higher perfect game rate (30%) than Rhea (29%). Below, a horizontal bar chart compares specific play styles: Aman is more likely to play 'By The Book' (solving in exact order, 13%) and 'Total Flop' (losing all attempts, 6%). Rhea is significantly more likely to 'Clutch' (win with 3 mistakes made, 17%) and solve 'Purple First' (cracking the hardest category first, 8% vs Aman's 3%)
December 27, 2025 at 6:41 AM
Reposted by Hadley Wickham
cedricscherer.com
🎄 Hope you’ve got all your presents ready 💝

Google search interest shows a stable pattern:

🎅 “Christmas gift wife” peaks just before Christmas Eve
🎅 “Christmas gift husband” peaks much earlier

#MerryChristmas to all of you! 🎁

📈 Google Trends (Nov 18–Dec 24, 2020–2024)
#dataviz #ggplot2
Line chart of Google search interest for “Christmas gift wife” and “Christmas gift husband” from November 18 to December 24. Bold lines show the average pattern across 2020–2024, while lighter shaded lines represent individual years. Shaded areas highlight which term has higher search interest at each point in time. The chart shows that searches for gifts for wives peak later in December than searches for gifts for husbands.
December 24, 2025 at 10:16 AM
Reposted by Hadley Wickham
chezvoila.com
My tip is to give generously, without expectation. There cannot be a social network if everyone is coming to extract attention without putting as much in it.

So share cool stuff, repost, comment, like, all in the merriest way. 🎄
December 19, 2025 at 7:10 PM
Reposted by Hadley Wickham
clauswilke.com
Reminder that similar mistakes can easily arise in Python.
December 21, 2025 at 3:28 PM
Reposted by Hadley Wickham
smachlis.bsky.social
Some thoughts on what can help make a (reasonably) happy retirement, a year and a half into this new stage of my life.

nextchapter.machlis.com/posts/2025-1... #Retirement #NextChapter
What Makes a (Reasonably) Happy Retirement? – My Next Chapter: A Retirement Journey
A couple of thoughts almost a year and a half in
nextchapter.machlis.com
December 21, 2025 at 1:47 PM
Reposted by Hadley Wickham
simonpcouch.com
In this edition of the @posit.co AI Newsletter, some 🎄Year In Review🎄, notes on GPT 5.2, and an experimental AI product for RStudio users.

posit.co/blog/2025-12...
2025-12-19 AI Newsletter - Posit
In this edition of the Posit AI Newsletter, we dive into the most important AI news and research from the past two weeks. Curated for the data science community, we cover everything from model updates...
posit.co
December 19, 2025 at 5:51 PM
Reposted by Hadley Wickham
simonwillison.net
I see a lot of complaints about untested AI slop in pull requests. Submitting those is a dereliction of duty as a software engineer: Your job is to deliver code you have proven to work simonwillison.net/2025/Dec/18/...
Your job is to deliver code you have proven to work
In all of the debates about the value of AI-assistance in software development there’s one depressing anecdote that I keep on seeing: the junior engineer, empowered by some class of …
simonwillison.net
December 18, 2025 at 2:57 PM
Reposted by Hadley Wickham
rconsortium.bsky.social
Fantastic! $650k awarded via the Research Software Maintenance Fund for “Enabling the Next Generation of Contributors to R”—mentoring new contributors, modernizing R’s dev infrastructure, and strengthening the R Foundation.

r-consortium.org/posts/650K-f...

#rstats
R Consortium - Enabling the Next Generation of Contributors to R
The Software Sustainability Institute (UK) has awarded a grant of USD $650,000 under the Research Software Maintenance Fund, to the project Enabling the Next Generation of Contributors to R.
r-consortium.org
December 18, 2025 at 5:27 PM
Reposted by Hadley Wickham
simonpcouch.com
GPT 5.2 is now included in our R code generation eval! The -Pro version is slightly SoTA at a substantially higher price point than similar performers.

Read more: skaltman-model-eval-app.share.connect.posit.cloud
A scatter plot comparing AI models by R coding accuracy (percent correct) versus total cost in USD, with points colored by provider (Anthropic in purple, Google in yellow, OpenAI in blue). Claude Opus 4.5 and GPT-5.2 Pro achieve the highest accuracy (~70%), but Claude Opus 4.5 does so at roughly one-sixth the cost of GPT-5.2 Pro.
December 12, 2025 at 6:20 PM
Reposted by Hadley Wickham
ellakaye.co.uk
🎉 Big news for the future of #RStats. The project

"Enabling the next generation of R contributors"

has received £500k over 2 years.

- mentoring expert contributors
- modernising infrastructure
- improving governance
- strengthen communication and outreach

www.software.ac.uk/rsmf-round-1...
RSMF Round 1 Projects | Software Sustainability Institute
Round 1 of the Research Software Maintenance Fund awarded just under £3 million to 13 projects selected for their potential to deliver high impact, value for money, feasibility, and quality. The funde...
www.software.ac.uk
December 12, 2025 at 12:15 PM