Martine Jansen
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martinejansen.bsky.social
Martine Jansen
@martinejansen.bsky.social
93 followers 150 following 81 posts
Institutional researcher for higher education , statistician, data scientist, and #rstats enthousiast
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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
Reposted by Martine Jansen
ec.europa.eu
Choose Science. Choose Europe.

A new Marie Skłodowska-Curie Actions Postdoctoral Fellowships 2025 call is now open.

With a budget of €404.3 million, it will support around 1,650 researchers from Europe and beyond.

Apply by 10 September → europa.eu/!fBTMgF
A graphic for the Marie Skłodowska-Curie Actions (MSCA), showing a historical portrait of Marie Skłodowska-Curie overlaid with an image of four young researchers walking down a hallway. The European Commission logo is in the top left. Text reads: "Marie Skłodowska-Curie Actions – €404.3 million to support postdoctoral researchers”
May 8, 2025 at 10:12 AM
Reposted by Martine Jansen
cecibaldoni.bsky.social
Join me on May 28th to talk about Scrollytelling 🥳😍
rladiesamsterdam.bsky.social R-Ladies Amsterdam @rladiesamsterdam.bsky.social · May 7
🚨 New Event! 🚨

Scrollytelling Science with Quarto and Closeread
Featuring: @cecibaldoni.bsky.social

📅 May 28, 2025 | 18:00-19:00 CET

Learn to create engaging scientific narratives with interactive storytelling techniques!

Register: www.meetup.com/rladies-amst...

@rladies.org #RStats #rladies
May 8, 2025 at 5:39 AM
Reposted by Martine Jansen
jonthegeek.com
Curator: @noamross.net
@dslc.io welcomes you to week 18 of #TidyTuesday! We're exploring National Science Foundation Grant Terminations under the Trump Administration!

📁 https://tidytues.day/2025/2025-05-06

#RStats #PyData #JuliaLang #DataViz #tidyverse #r4ds
Logo for the #TidyTuesday Project. The words TidyTuesday, A weekly data project from the Data Science Learning Community (dslc.io) overlaying a black paint splash. TidyTuesday is a weekly social data project. All are welcome to participate! Please remember to share the code used to generate your results! TidyTuesday is organized by the Data Science Learning Community. Join our Slack for free online help with R and other data-related topics, or to participate in a data-related book club! How to Participate Data is posted to social media every Monday morning. Follow the instructions in the new post for how to download the data. Explore the data, watching out for interesting relationships. We would like to emphasize that you should not draw conclusions about causation in the data. Create a visualization, a model, a shiny app, or some other piece of data-science-related output, using R or another programming language. Share your output and the code used to generate it on social media with the #TidyTuesday hashtag. A word cloud of the most frequent terms in terminated NSF grant titles and abstracts, with words of different sizes, and different colors, with purple for the largest, red medium, and green small. "Black" stands out prominently in purple. In red, we see "climate", "student", "network", "justice", "identity", "teacher", and "undergraduate".
May 5, 2025 at 1:39 PM