Wolfgang Viechtbauer

Bifurcation diagram for the logistic map Bifurcation diagram for the logistic map. GitHub Gist: instantly share code, notes, and snippets.

Since this is an #Rstats post ... R code to create a bifurcation diagram for the logistic map here: gist.github.com/wviechtb/f49...

Exactly. Same for me under full 4k resolution, which is crazy. I assume you are also using 200% scaling. Go to Properties for RGui, Compatibility, Change high DPI settings, High DPI scaling override, Application, and then try dev.size("px") again. Should be 2x.

That's also what I initially thought, but it's not that. What do you get when you open Rgui and run dev.size("px")?

I rarely use Windows, but noticed that #Rstats plots under Windows (using windows()) looked very fuzzy even with a 4k resolution. This seems to be related to DPI scaling (the system was using 200%). If I override the DPI settings for Rgui, then things are nice and crisp. Is this common knowledge?

Benchmark comparison of for-loops versus apply()/sapply() in 3 different versions of R (2.5.0, 3.0.0, 4.2.0) Benchmark comparison of for-loops versus apply()/sapply() in 3 different versions of R (2.5.0, 3.0.0, 4.2.0) - output.txt

So many myths around loops in R as Juli said. Some specialized functions like rowMeans() are indeed faster but the *apply() family is not. A while ago, I did some benchmarking across R versions: gist.github.com/wviechtb/83e...

Oh please make this happen! This kind of REPL like functionality is so essential.

Owning a house is how I personally verified the Second Law of Thermodynamics: If you stop adding energy, money, and time into it, everything falls apart.

Cartoon picture of an artillery fun shooting a bunch of questionnaires at a person with the words "A BATTERY OF QUESTIONNAIRES" at the top.

Whenever I read 'battery of questionnaires', I think of ...

Given that John Watts studied psychology, you can't tell me that the band name Fischer-Z is not actually based on Fisher's r-to-z transformation (and that the 'fish's head' pun was invented later).

For people in #academia -- What's the oldest email in your inbox that you still plan to respond to at some indeterminate timepoint in your life? (in other words: Please make me feel better about my inbox of shame)

You arrive at #Oslo airport, stand at the baggage claim, wonder why you have wifi, and realize that #eduroam works in the entire airport.

Structural and practical identifiability analysis of partially observed dynamical models by exploiting the profile likelihood Abstract. Motivation: Mathematical description of biological reaction networks by differential equations leads to large models whose parameters are calibra

This one also touches on the same issues: doi.org/10.1093/bioi...

plotannotate: Annotate Plots Interactively annotate 'base R graphics' plots with freehand drawing, symbols (points, lines, arrows, rectangles, circles, ellipses), and text. This is useful for teaching, for example to visually exp...

The plotannotate package (#RStats) is now on CRAN:

cran.r-project.org/package=plot...

The package allows users to annotate base R graphics plots with freehand drawing, symbols, and text. This is useful for teaching (e.g., to visually explain certain plot elements) and creating quick sketches.

A review of spline function procedures in R - BMC Medical Research Methodology Background With progress on both the theoretical and the computational fronts the use of spline modelling has become an established tool in statistical regression analysis. An important issue in splin...

The paper about splines in R that I wish I had known about when I was learning splines in R.

bmcmedresmethodol.biomedcentral.com/articles/10....

That's using Command, right? Control should given "ctrl-f" (and so on).

Yeah, Command isn't captured by getGraphicsEvent(). But Control works as intended. Thanks!

I got confirmation over at Mastodon that this returns ctrl-F ctrl-B, and ctrl-I (as expected).

Would somebody using #Rstats under macOS be so kind and do the following:

x11()
plot(1)
getGraphicsEvent(onKeybd=function(key) return(key))

then click on the plot, and hit control-f (and the same with control-b and control-i) and tell me what it shows in the console?

Happy to finally share the preprint for our work on how affective inertia differs within-days and overnight (with Stacey Scott, Martin Sliwinski, Josh Smyth, @wviechtb.bsky.social chtb.bsky.social‬ and @aneubauer.bsky.social) 1/4

You might be underestimating how nerdy the crowd is. A considerable part of the people in that group grew up with C64s and fondly remember cracker intros and the demo scene.

Depends on what the code is doing. Some things can benefit greatly from parallel processing, others not at all. But in the former case, users can usually do the parallelization themselves (esp. for problems that are embarrassingly paralizable), so then rewriting code in C might be more useful.

Interested in research synthesis, meta-analysis, systematic reviews, methodology, software, guidelines, best practices? 😀 📊

This #YouTube channel is really the best spot to learn and meet our community! 👇

A "Mr. McMahon reaction meme" where McMahon shows increasing levels of amazement/excitement, with levels "I^2", "tau^2", and "prediction interval", and "predictive distribution".

ESMARConf2025: Keynote - Misunderstandings and misuses of commonly-cited methods... - Julian Higgins YouTube video by ESMARConf

Planning to do a systematic review?
Do watch this very informative presentation first!
Julian Higgins talks about improper use of:

PRISMA reporting guideline
I-squared statistics
Test for asymmetry in funnel plots
Random effects model

#ESMARConf2025

m.youtube.com/watch?v=wRA0...

I love auto translations. "The Tasmanian-led approach to random-effects meta-analysis". 😕 Didn't know that there was a Tasmanian school for meta-analysis! Learning something new every day. #ESMARConf2025

ESMARConf2025: Tutorial metaselection: Meta-analytic selection models with... - James Pustejovsky YouTube video by ESMARConf

Super interesting talk by James Pustejovsky (@jepusto.bsky.social) and Martyna Citkowicz at #ESMARConf2025 on the metaselection package, which provides cluster-robust inference methods and clustered bootstrapping to account for dependencies in selection models: youtu.be/2qGcVeEqtBY

ESMARConf About ESMARConf The Evidence Synthesis Hackathon’s (https://www.esmarconf.org) Evidence Synthesis & Meta-Analysis in R Conference (#ESMARConf2025) will take place on 11th-13th of June 2025. ESMARConf ...

#ESMARConf2025 is live (www.youtube.com/@esmarconf), starting with a talk by @asanchez-tojar.bsky.social on "Practising what we preach: Rethinking standards in meta-analysis for ecology and evolution". At 11am CEST, I will give a talk on how to visualize the amount of heterogeneity in forest plots.

On Thursday evening during my weekly live stream on R and statistics, I will do something meta-analysis related in connection with #ESMARConf2025. Further details about my live streams can be found here: www.wvbauer.com/doku.php/liv...

2025 - ESMARConf

Just a reminder that #ESMARConf2025 is starting tomorrow! This is a free online conference about evidence synthesis and meta-analysis using #Rstats. Further details can be found here: esmarconf.org/2025/

Tuberculosis still kills around 1.3 million people every year.

It was once a massive killer in Europe and the US, but not anymore. How did these countries manage to tackle it?

Our first article on TB in a three-part series: ourworldindata.org/tuberculosis...