Daniel Roelfs
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danielroelfs.com
Daniel Roelfs
@danielroelfs.com
Data Scientist - PhD in computational neuroscience - he/him - #rstats / #python

danielroelfs.com
I absolutely adore reveal.js. I've used it as my main slideshow tool for the past years. If you know a bit of HTML/CSS it's super easy to create beautiful and dynamic slides (+ Quarto integration <3). I wrote a short post about my enthusiasm here: danielroelfs.com/posts/ode-to...
Daniel Roelfs
An ode to reveal.js
danielroelfs.com
October 23, 2025 at 7:36 PM
✨New blog post✨

Remote sensing of vineyard health 🍇

I felt inspired by a data visualization exhibition I visited a while ago and decided to try my hand at remote sensing and analyzed some satellite images in Python.

danielroelfs.com/posts/remote...
Daniel Roelfs
Remote sensing of vineyard health
danielroelfs.com
May 13, 2025 at 5:22 PM
Reposted by Daniel Roelfs
This week on What's New in R:

✅ A new R package by Joey Marshall for accessing elevation data
✅ Overview of what’s new in R 4.5, compiled by Russ Hyde of Jumping Rivers
✅ A guide to replicating Financial Times-style data visualizations, by Daniel Roelfs

Read the issue: buff.ly/Y4HwU4g

#rstats
What’s New in R: April 28, 2025
Explore the latest in R, including a new package for U.S. elevation data, updates in R 4.5.0 like the use() function, and a guide to creating FT data viz.
buff.ly
April 28, 2025 at 3:02 PM
I admire John Burn-Murdoch's ability to create really effective data visualizations. So much that I took the liberty of breaking down one of his recent figures that made the rounds and see if I could recreate it in R using only ggplot. Here's the breakdown:

danielroelfs.com/blog/financi...
Daniel Roelfs
Learning data viz from the best: the Financial Times
danielroelfs.com
April 16, 2025 at 7:57 PM
Anyone that uses Strava has access to a large, self-generated (!), dataset 🧡. And at the end of the year it's quite fun to try to parse something interesting and relevant from that dataset: danielroelfs.com/blog/strava-...
Daniel Roelfs
Strava Data Analysis using Python and R
danielroelfs.com
December 30, 2024 at 9:40 PM
Reposted by Daniel Roelfs
🚨 This will become a curated list of awesome tools for complex trait genetics, **add yours**! it may become a review in which case those who contribute are invited as co-authors.
GitHub - MichelNivard/awesome-complex-trait-genetics: A list of awesome tools for complex trait genetics.
A list of awesome tools for complex trait genetics. - MichelNivard/awesome-complex-trait-genetics
github.com
November 28, 2024 at 9:21 AM
Last Tuesday I defended my PhD in computational neuroscience and psychiatric genetics 🥳

PhD theses are rarely read outside of the supervisors and committee, so I tried to write it in an accessible way and published a digital version here: thesis.danielroelfs.app

- Daniel Roelfs, PhD
November 24, 2024 at 1:42 PM
Reposted by Daniel Roelfs
Mendelian randomization users, what should I call a polygenic score created for and used with MR?
I find PGS/PGI confusing to newcomers as not all ways of creating a PGS will do.
Would it be clearer to call this score an allelic score instead? Or something else?
July 22, 2024 at 2:19 PM
It's hard to explain why scientific publishers like Elsevier and Springer-Nature make the kind of money they do.

So hard that I did the data analysis and wrote it down so I could easily share it and perhaps help others understand how broken the system is:

danielroelfs.com/blog/the-mon...
Daniel Roelfs
Daniel Roelfs' personal website
danielroelfs.com
May 9, 2024 at 10:46 AM
Our latest paper is now published in Nature Mental Health ✨

We applied a multivariate GWAS implemented through the Bayesian framework in MOSTest on UK Biobank fMRI data and found widespread overlap with psychiatric disorders

www.nature.com/articles/s44...
Genetic overlap between multivariate measures of human functional brain connectivity and psychiatric...
Using a multivariate approach in a sample from the UK Biobank, the authors examine the genetic relationships between measures of functional connectivity and psychiatric disorders.
www.nature.com
January 8, 2024 at 6:59 PM
Are people (and neuroscientists in particular) aware that that the SfN chair has a total compensation of about $960.000? That's about 4% of total revenue. I've left academia a while ago and Twitter is terrible since the takeover so maybe I missed some discourse, but it feels that's a lot? Source:
Society For Neuroscience - Nonprofit Explorer - ProPublica
Since 2013, the IRS has released data culled from over 1.8 million nonprofit tax filings. Use this database to find organizations and see details like their executive compensation, revenue and expense...
projects.propublica.org
December 14, 2023 at 7:01 PM