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Posts by Martin Mächler

A vertical, vintage-style travel poster for the useR! 2026 Conference.

The illustration features a stylized bird in flight at the top left, soaring toward a large, orange circular emblem containing a white letter "R" that mimics a rising sun with radiating rays. Below the sun is a minimalist, mid-century modern cityscape of Warsaw, rendered in black, white, and orange, featuring historic silhouettes and a bridge over a river.

The text is presented in a bold, sans-serif font:

Top: "EARLY BIRD TICKETS!"

Middle: "useR! 2026 CONFERENCE"

Bottom: A decorative banner reads "useR! 2026 CONFERENCE | WARSAW • JULY 2026"

A vertical, vintage-style travel poster for the useR! 2026 Conference. The illustration features a stylized bird in flight at the top left, soaring toward a large, orange circular emblem containing a white letter "R" that mimics a rising sun with radiating rays. Below the sun is a minimalist, mid-century modern cityscape of Warsaw, rendered in black, white, and orange, featuring historic silhouettes and a bridge over a river. The text is presented in a bold, sans-serif font: Top: "EARLY BIRD TICKETS!" Middle: "useR! 2026 CONFERENCE" Bottom: A decorative banner reads "useR! 2026 CONFERENCE | WARSAW • JULY 2026"

📢 Early Bird tickets for useR! 2026 in #Warsaw are still on sale!!

Join the global #RStats community from July 6–9 for inspiring talks and hands‑on workshops.

⏳ Early Bird ends 20th April — don’t miss out!
🎟️ Register now to save:
🔗 user2026.r-project.org/register.html

#DataScience #OpenSource

3 days ago 4 1 0 0

Nice graphic (circle packing). I think it would be a much fairer comparison if you visualized "per capita" (coming from a relatively small country, Switzerland, we would indeed look less cute, but rightly so).

1 week ago 1 0 1 0
Screen shot of text: 
Travel patterns show Canadians are choosing different paths
The decline in cross-border travel isn’t small. In January 2026, only 2.1 million Canadians returned from trips to the United States, down from 2.7 million the year before. Car trips fell even harder, dropping 26.3% to 1.3 million crossings.

Air travel decreased 12.8% to about 753,000 trips. For the first time in modern history, more Canadians returned by automobile from overseas destinations than from the United States. This represents a fundamental change in how Canadians choose to spend their travel dollars and vacation time.

Screen shot of text: Travel patterns show Canadians are choosing different paths The decline in cross-border travel isn’t small. In January 2026, only 2.1 million Canadians returned from trips to the United States, down from 2.7 million the year before. Car trips fell even harder, dropping 26.3% to 1.3 million crossings. Air travel decreased 12.8% to about 753,000 trips. For the first time in modern history, more Canadians returned by automobile from overseas destinations than from the United States. This represents a fundamental change in how Canadians choose to spend their travel dollars and vacation time.

Help me understand? #statistics #strangefacts #impossibility

1 week ago 4 4 1 0
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So schnell kann es gehen: Gestern noch #Frühling🌺, heute wieder #Winter❄️. Vielen Dank für die tollen Meteo Meldungen aus der ganzen Schweiz! Bild: Les Valettes (VS), Meteo Meldung, Meteoswiss App

3 weeks ago 10 3 0 0

#rstats package developer's joy:

3 weeks ago 5 0 0 0

Really ???? How irresponsible to go against the Internet Archive !!

1 month ago 1 0 0 0

Congratulations to the baby! (the human one, not the software ;-)😜

1 month ago 1 0 0 0

...as @r-foundation.bsky.social knows all too well. #rstats

1 month ago 2 1 0 0
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Me too. ((Teaching R and in general: I think the bigger problem nowadays is motivating students to *think* more rather than just letting an AI ..))

1 month ago 1 0 0 0

Loops are fine in R - notably in such cases (showing video by looping through frames). Whoever told you "should avoid" without qualification was not a good teacher of R.

1 month ago 0 0 0 0
Debugging Sensitivity to C math library on Linux - The R Blog

New #RStats blog post from Tomas Kalibera: Debugging Sensitivity to C math library on Linux.

Following on from the previous blog entry, this post introduces the mfuzz tool which can be used on Linux to empirically calibrate the tolerance of numerical tests.

blog.r-project.org/2026/01/30/d...

2 months ago 3 2 0 1
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I’ve changed my header photo to this one. It shows my father Herbert and his sister Lotte with their parents Fritz and Marta in their Frankfurt apartment before Herbert and Lotte were sent to England on the Kindertransport, and later Fritz and Marta transported to Lodz Ghetto, final fate unknown.

1 year ago 1368 171 76 5

Go, Canada!

3 months ago 2 0 0 0
A promotional image for the UseR! Conference.

Top text: "UseR! Conference, 7-9 July, 2026, Warsaw".

Image: A scenic photograph of the Warsaw, Poland skyline at sunset, featuring prominent skyscrapers like the Palace of Culture and Science bathed in golden light.

Bottom section: A text box with the useR! logo in the corner. The text reads: "Why Sponsor useR! 2026? useR!2026 brings together R users, developers, and enthusiasts from around the world. Your sponsorship helps us maintain affordable registration rates while delivering a high-quality conference experience."

A promotional image for the UseR! Conference. Top text: "UseR! Conference, 7-9 July, 2026, Warsaw". Image: A scenic photograph of the Warsaw, Poland skyline at sunset, featuring prominent skyscrapers like the Palace of Culture and Science bathed in golden light. Bottom section: A text box with the useR! logo in the corner. The text reads: "Why Sponsor useR! 2026? useR!2026 brings together R users, developers, and enthusiasts from around the world. Your sponsorship helps us maintain affordable registration rates while delivering a high-quality conference experience."

Support Open-Source Data Science-Sponsor UseR! 2026
Join us in Warsaw 6–9 July 2026 at the premier event for R. As a sponsor, you help power an inclusive, high-impact event while reaching thousands of researchers, developers, and educators.
user2026.r-project.org/about/sponso...

#RStats #useR2026

6 months ago 11 7 0 0
SSI awards funding to 13 projects through the RSMF Round 1 | Software Sustainability Institute We are pleased to announce that the Research Software Maintenance Fund (RSMF) has funded 13 projects to advance the sustainability and impact of research software. Through this initiative, the SSI, wi...

The R Foundation is happy to be a partner on the project

"Enabling the next generation of R contributors"

awarded £500k under the Research Software Maintenance Fund (Software Sustainability Institute, UK).

Announcement: www.software.ac.uk/ssi-awards-f...

Congratulations to the project team!

4 months ago 43 15 1 1

I remember John Fox as one of the most kind R Foundation #rstats members (ca. 2006-2023) giving wise and kind words often. The 1-1 interview he held with several of us, resulting in a useR!2008 pres and the article journal.r-project.org/articles/RJ-... It is sad to miss him. May he rest in peace!

4 months ago 24 5 3 0
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The #rstats community has given me so much, and I give back enthusiastically! I love this stuff. It's easy to talk and teach about stuff you love ❤️❤️❤️ But you're right, this community is just the best, most generous group ✨

5 months ago 3 1 0 0

Ok, that's it. Just a story about how much I love R, how much I miss teaching, my love for stats, and my amazing friend on her PhD journey 😌 I hope you spent your weekend doing things that feel magical, too!! 🪄✨
8/8

5 months ago 20 2 2 0

We've used this in student exercises (using #rstat R) before...
.. embarrassing that Swiss official news casts on the Sechseläuten use this yearly being seemingly serious about its predictive power ... horrifying me every year.

6 months ago 2 0 0 0
Preview
Niall Ferguson: Without Books We Will Be Barbarians It is not the road to serfdom that awaits—but the steep downward slope to the status of a peasant in ancient Egypt, writes Niall Ferguson.

Niall Ferguson: Without Books We Will Be Barbarians www.thefp.com/p/niall-ferg... quiet convincing & frightening. Will we (mankind) "turn around"?

6 months ago 0 0 0 0
The Sovereign Tech Fund invests $450,000 in R Foundation to Enhance R’s Sustainability and Security – R Consortium R Foundation embarking on a crucial project to modernize R’s core infrastructure, improve its maintainability, and fortify its supply chain.

🚨 Big news for the R Community!

The Sovereign Tech Fund has invested $450,000 in the R Foundation to strengthen R’s sustainability, security, and modernization.

Details: r-consortium.org/posts/sovere...

#rstats #opensource #datascience

6 months ago 52 8 2 3
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2025 DuckDuckGo Charitable Donations DuckDuckGo is donating $1.1 million in 2025 to support organizations that share our vision of raising the standard of trust online.

EFF thanks DuckDuckGo for their generous support as we continue the fight to protect your privacy online!

6 months ago 179 30 2 4

and then .. you did / didn't make it available?

7 months ago 2 0 1 0
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They tried to kill us (a missile hit like three blocks from us),

We survived (but are very tired),

Let's eat (pancakes!)

10 months ago 18 1 2 0

You're right ... but it's fun and somewhat insightful, I love it!

10 months ago 0 0 0 0
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useR! Early Bird sales end this Wednesday on April 30th!

useR! Early Bird sales end this Wednesday on April 30th!

REMINDER!!! Early Bird Registration for useR! 2025 is open until April 30th!

Join this gathering of leaders in industry, academia, and the government to network while you increase your expertise in #R.
user2025.r-project.org/register

#useR2025 #RStats #coding #statistics #coding #data

11 months ago 13 13 0 2
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After a massive Russian missile strike on Kyiv, teens waited 12 hours at the rubble of their friend’s home.

He was found dead.

Three children were killed in the attack.

One friend said simply, “He was good. I want people to know that.”

Photo: UNICEF Ukraine

11 months ago 253 110 12 10
An autumn scene of the Duke Belltower along with the useR! 2025 logo and text about the early bird ticket special.

An autumn scene of the Duke Belltower along with the useR! 2025 logo and text about the early bird ticket special.

Early Bird for useR! 2025 is open until April 30th!

Join this gathering of leaders in industry, academia, and the government to network while you increase your expertise in #R.
useR! will be held from August 8th to August 10th at Duke University.

Conference page: user2025.r-project.org
#rstats

1 year ago 5 5 0 0