Martine Jansen
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martinejansen.bsky.social
Martine Jansen
@martinejansen.bsky.social
100 followers 150 following 86 posts
Institutional researcher for higher education , statistician, data scientist, and #rstats enthousiast
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Reposted by Martine Jansen
rmcelreath.bsky.social
I'm teaching Statistical Rethinking again starting Jan 2026. This time with live lectures, divided into Beginner and Experienced sections. Will be a lot more work for me, but I hope much better for students.

I will record lectures & all will be found at this link: github.com/rmcelreath/s...
course schedule as a table. Available at the link in the post.
December 9, 2025 at 1:58 PM
Reposted by Martine Jansen
was.tl
The first #AdventOfCode 2025 puzzle comes out in about five hours! What's your plan? What language(s?!) are you using? What's your IDE of choice and why is it Vim? Do you have a comfy chair? Did you check out the beta release of Lua 5.5? How much sleep have you gotten? Drinking enough water? 🌟 ❤️ 🎄
November 30, 2025 at 11:59 PM
Reposted by Martine Jansen
drmowinckels.io
🎄 ANNOUNCEMENT: R Package Development Advent Calendar 2025! 🎄

Starting December 1st, I'm launching a 25-day journey through modern R package development. here's why you should follow along 🧵

#rstats #RPackageAdvent2025 #OpenSource
A festive digital illustration features the blue R logo wearing a red Santa hat with white trim on the left. To its right stands a green Christmas tree made entirely of curly braces arranged in a triangular shape. White and light-blue %>% pipe symbols float across a dark blue, starry background like snowflakes. A speech bubble above the R logo says “Ho Ho Ho! 📦” in red text. At the bottom, white text reads: “R Package Development Advent Calendar 2025” and below it, “25 Days of Coding Magic • Dec 1–25.”
November 30, 2025 at 10:03 AM
Reposted by Martine Jansen
ionica.mathstodon.xyz.ap.brid.gy
Fijne Pythagoras dag!
9-16-25 :pythagoras:
Een rechthoekige driehoek met zijden 3, 4 en 5
September 16, 2025 at 7:23 AM
Reposted by Martine Jansen
adamjkucharski.bsky.social
Want a large language model that never hallucinates? Easy: just get it to always print “I don’t know”, regardless of the input.

If you find this solution is a bit unsatisfying, you’re not alone. But it hits on a crucial trade-off with learning machines and decision-making more generally.

New post:
An LLM that never hallucinates
There are two big errors we can make with information, but one often gets forgotten
kucharski.substack.com
September 10, 2025 at 5:53 PM
martinejansen.bsky.social
This will (hopefully :) ) make table polishing in #quarto #rstats #typst so much more easy: #tinytable in vincentarelbundock.github.io/tinytable/vi...
vincentarelbundock.github.io
September 8, 2025 at 3:18 PM
martinejansen.bsky.social
Anyone an idea where I can find the source code of ardata.fr/ggiraph-book/ ? The github link on the website is dead. #ggplot2 #rstats #ggiraph. Thanks!
ggiraph-book
ardata.fr
August 20, 2025 at 2:37 PM
Reposted by Martine Jansen
avehtari.bsky.social
All three books I've co-authored are freely available online for non-commercial use:

- #Bayesian Data Analysis, 3rd ed (aka BDA3) at stat.columbia.edu/~gelman/book/

- #Regression and Other Stories at avehtari.github.io/ROS-Examples/

- Active Statistics at avehtari.github.io/ActiveStatis...
The cover of Bayesian Data Analysis book The cover of Regression and Other Stories book The cover of Active Statistics book
August 2, 2024 at 1:35 PM
Reposted by Martine Jansen
bendouglas.bsky.social
That’s it I’m firing R because my results weren’t significant
August 2, 2025 at 12:28 AM
Reposted by Martine Jansen
coolbutuseless.fosstodon.org.ap.brid.gy
Introducing {crosswordio} - an #rstats pkg to read/write/plot crosswords in "PUZ" format.

https://github.com/coolbutuseless/crosswordio

#RStats
Raw data when reading a puz file A crossword, read with {crosswordio} and plotted with {grid} graphcs
July 28, 2025 at 8:20 AM
martinejansen.bsky.social
#rstats #ggplot Revelation of the day: `geom_*()` and `stat_*()` are wrappers for `layer() ` with respectively a fixed geom or stat argument. Now `stat_*()` suddenly feels less complex. Thank you @cedricscherer.com and @yan-holtz.bsky.social for making www.ggplot2-uncharted.com
Statistical Transformations | ggplot2 Uncharted
ggplot2 layers apply statistical transformations to data before plotting. Customizing these using the stat argument and stat_*() layers enables flexible, advanced visualizations.
www.ggplot2-uncharted.com
July 23, 2025 at 1:48 PM
Reposted by Martine Jansen
datavisfriendly.bsky.social
For a book I'm writing I want to print text in colors. #rstats #quarto

This gist: gist.github.com/friendly/b2a... defines a colorize() function that can be used easily for HTML and LaTeX/PDF documents in .qmd and .rmd files.
Render text in color for Markdown / Quarto | Format refs to packages in inline text
Render text in color for Markdown / Quarto | Format refs to packages in inline text - colorize.R
gist.github.com
July 20, 2025 at 5:31 PM
Reposted by Martine Jansen
tomgauld.bsky.social
My cartoon for this week’s @theguardian.com books.
Two figures approach the Baggage Reclaim area of an airport. One says “We wouldn't need to put things in the hold if you brought fewer books on holiday.” Arriving on the carousel, amongst the bags and suitcases is a very large, well-stocked bookcase.
July 20, 2025 at 10:07 AM
Reposted by Martine Jansen
rainbowr.org
🌈 🌐 rainbowR conference: online, early 2026 🌐 🌈

Are you LGBTQIA+, do you code in R, and would you like to get involved in rainbowR’s first-ever conference? We are looking for people to join our conference organising committee!

➡️ rainbowr.org/conference
🗓️ 1st meeting: July 9, 4pm UTC
Conference – rainbowR
Join our conference organising committee! See our conference page for more info.
rainbowr.org
July 7, 2025 at 4:12 PM
Reposted by Martine Jansen
coatless.bsky.social
Scattered links 🔗 driving you crazy in a post?

The linkate Quarto extension automatically collects every URL and creates a tidy "Links" section at the bottom. Just add one line to your YAML!

📚 Docs: quarto.thecoatlessprofessor.com/linkate/
💻 Repo: github.com/coatless-qua...

#quarto
A browser screenshot showing the linkate extension demo page rendered in HTML. The page displays the linkate hexagonal logo on the left sidebar and demonstrates different types of links (Basic Links, Reference-Style Links, Mixed Link Types) in the main content area. At the bottom, a "Links" section shows a bulleted list containing all URLs automatically collected from throughout the document, including links to Quarto, GitHub, CRAN, R Project, Python, and other resources. A hexagonal logo for the "linkate" extension featuring a dark blue background with white text reading "linkate" at the bottom. The center displays an abstract network design with interconnected oval shapes in orange and red gradients connected by thin lines, representing linked elements converging around a central hub.
July 6, 2025 at 8:58 AM
Reposted by Martine Jansen
mtvtjilpt.bsky.social
Een vrouw die ik zeer bewonder zei ooit: toekomstdromen uitspreken vergroot de kans dat ze uitkomen. Nu dan. Ik zou dolgraag maatschappijkritische rijmpjes willen maken voor een kwaliteitskrant. Gerijmde columns, als het ware, zoals bijgevoegd voorbeeld. PS Het was @ionica.mathstodon.xyz.ap.brid.gy
June 21, 2025 at 7:23 AM
Reposted by Martine Jansen
rladiesamsterdam.bsky.social
🚨 New Event 🚨
From Code to Crisis Response: Using #rstats for Public Health Impact at the CDC w/ @kcharniga.bsky.social

📅 July 1, 2025
⏰ 16:00-17:00 CET
🔗 www.meetup.com/rladies-amst...

Join us to learn practical R applications in crisis response and beyond!

#rladies #EpiSky #IDSky @rladies.org
R-Ladies Amsterdam event flyer for "From Code to Crisis Response: Using R for Real-World Public Health Impact at the CDC" presented by Kelly Charniga, PhD. The event is scheduled for Tuesday, July 1, 2025 from 16:00-17:00 CET. The flyer features the R-Ladies Amsterdam logo with illustrated Dutch buildings and a bicycle, and includes a photo of the smiling presenter wearing a light blue hoodie outdoors with a small dark dog.
June 16, 2025 at 9:20 AM
martinejansen.bsky.social
Looks like #rstats {datapasta} will save a lot of time & typing. Nice!
cghlewis.bsky.social Crystal Lewis @cghlewis.bsky.social · Jun 12
Thanks to Jenny Richmond for sharing examples of how to use #rstats {datapasta} to copy and paste data from anywhere into R.
www.youtube.com/watch?v=utQm...
www.youtube.com
June 12, 2025 at 8:47 PM
martinejansen.bsky.social
Sometimes the goodreads book recommendations make me grin 😄 It would be interesting to know how many #rstats package book readers also read this one.
RECOMMENDATIONS: Because you are currently reading R Packages: Organize, Test, Document and Share Your Code: Bone, Vol 5: Rock Jaw Master of the Eastern Border by Jeff Smith
June 11, 2025 at 11:52 AM
Reposted by Martine Jansen
noahgreifer.bsky.social
Starting to look like I might not be able to work at Harvard anymore due to recent funding cuts. If you know of any open statistical consulting positions that support remote work or are NYC-based, please reach out! 😅
June 4, 2025 at 7:02 PM
Reposted by Martine Jansen
nickchk.com
The second edition of The Effect has been delayed a bit... because there were so many orders they had to switch to a bigger print run! Thank you everyone for your support, and check out the second edition here: www.routledge.com/The-Effect-A...
The Effect: An Introduction to Research Design and Causality
The Effect: An Introduction to Research Design and Causality, Second edition is an excellent teaching text about research design, specifically concerning research that uses observational data to make ...
www.routledge.com
June 6, 2025 at 5:28 PM
Reposted by Martine Jansen
carlzimmer.com
“I would like to cure brain cancer. I think that's not particularly controversial.” Be that as it may, the NIH terminated that scientist's grant. Here's a huge survey of the 2,500 grants that NIH has killed or delayed...so far. Gift link: nyti.ms/43Jz1yJ
A chart showing cancelled NIH grants
June 4, 2025 at 2:30 PM
martinejansen.bsky.social
A first today: I changed the citation style in my #rstats #Rmarkdown doc, and it was easy and it worked! Thanks to Nicolas Tierney's "Rmarkdown for scientists" rmd4sci.njtierney.com/citing-artic... and github.com/citation-sty.... Save the csl code in a file in your R project and add a YAML line. 😎
13 Citing Articles & Bibliography Styles | RMarkdown for Scientists
A book created for a 3 hour workshop on rmarkdown
rmd4sci.njtierney.com
May 31, 2025 at 7:43 PM
Reposted by Martine Jansen
posit.co
Registration for the posit::conf(2025) virtual experience is now open!

Join us virtually, Sept 16–18, and access live-streamed keynotes and 100+ talks, on-demand recordings, Q&A sessions, and our virtual networking platform.

Learn more in the blog post: posit.co/blog/posit-c...

#RStats #Python
Text: posit conf 2024 Virtual Tickets Available, Atlanta, September 16-18. A drawing outline of the Atlanta skyline and abstract cubes.
May 15, 2025 at 2:59 PM