Survival stacking: survival analysis translated as supervised classification in R and Python
Example of use of 'survivalist' in R and Python -- Survival stacking: survival analysis with any classifier [Read more...]
New R/exams Version: exams2forms, Written NOPS Exams, and More
New CRAN releases of the R/exams package and the accompanying exams2forms package with many new features and enhancements, especially for the written multiple-choice exams (NOPS).
Overview
The new version 2.4-2 of the...
Quicksummary of data for modeling and Machine Learning
Introduction
This blog is about the improved function, quicksummary in the Dyn4cast package. The function provides quick overview of data and particularly outputting five different means.
Observational study involves procuring large mass of data for ... [Read more...]
Simulating A Simple Response Adaptive Randomization – I Have To See It To Believe It
In my simulations of Response Adaptive Randomization, I discovered it performs comparably to fixed 50-50 allocation in identifying treatment effects. The adaptive approach does appear to work! However, with only 10 trials, I’ve merely scratched the surface. Important limitations exist - temporal bias risks, statistical inefficiency, and complex multiplicity adjustments ...
Cross checking OSM IDs between OSM and Wikidata
Mont Blanc – CC-BY-NC-ND by Viktor Kirilko
Some OpenStreetMap elements have Wikidata entities as attributes, like for example the summit of Mont Blanc has the key/value pair wikidata=Q583 directing to Mont Blanc where we can see it has ...
Rotation with Modulo
How well do you know your fundamental operators in different languages? ‘Easy’
examples help to fortify that knowledge, and comparing across languages makes
for some neat implementation detail discoveries.
I saw this toot from @gregeganSF on Mastodon
... [Read more...]
The recipe to debug your R code in VSCode
Debugging code in an everyday (often painful) task for developers. In a recent video, I presented how to debug R code in RStudio IDE.
Two native functions available natively in R were shown : browser() and debugonce(). They are very useful to de...
Model Diagnostics: Statistics vs Machine Learning
In this post, we show how different use cases require different model diagnostics. In short, we compare (statistical) inference and prediction. As an example, we use a simple linear model for the Munich rent index dataset, which was kindly provided by the authors of Regression – Models, Methods and Applications 2nd ...
30 Day Chart Challenge 2025
The
30 Day Chart Challenge is a data visualisation challenge organised by Cédric Scherer and Dominic Royé. Participants make one chart each day of the challenge, inspired by the daily prompt. The prompts are also split across 5 different categories, wh... [Read more...]
Working with Ordinal Ranks in {marginaleffects}
Given an ordinal regression model, it is relatively easy to get class-wise predictions - the conditional predicted probability of each level of the outcome. However, often, one might be interested in summarizing effects not on the class-wise pro...
Fast Grouped Counts and Means in R
Grouped counts and grouped (weighted)
means? How to calculate them? And how to do it as fast as possible?
March 2025 Top 40 New CRAN Packages
In March, one hundred eighty-two new packages made it to CRAN. Here are my Top 40 picks in sixteen categories: Agriculture, Archaeology, Biology, Climate Modeling, Computational Methods, Data, Ecology, Epidemiology, Genomics, Machine Learning, M...
Spatial machine learning with R: caret, tidymodels, and mlr3
This is the first part of a blog post series on spatial machine learning with R.
The R language has a variety of packages for machine learning, and many of them can be used for machine learning tasks in a spatial context (spatial machine...
vowels: Phonetics cloze quiz about Cardinal vowels
Cloze exercise in which two randomly-selected Cardinal vowels have to be described according to the three parameters vowel height, frontness-backness, and lip rounding.
Name:
vowels
Type:
cloze
Preview:
Desc...
flags: Fun with Flags
Single-choice knowledge quiz question in which the correct flag for a country has to be selected from a list of flags.
Name:
flags
Type:
schoice
Related: capitals, countrycodes
Preview:
Which is the fl...
Explained vs. Predictive Power: R², Adjusted R², and Beyond
1 Introduction
You trust R². Should you?
You proudly present a model with R² = 0.95. Everyone applauds.
But what if your model fails miserably on the next new data?
When building a statistical model, one of the first numbers analysts and...
surveydown: An Open-Source, Markdown-Based Platform for Interactive and Reproducible Surveys workshop
Join our workshop on surveydown: An Open-Source, Markdown-Based Platform for Interactive and Reproducible Surveys, which is a part of our workshops for Ukraine series! Here’s some more info: Title:surveydown: An Open-Source, Markdown-Based Platform for Interactive and Reproducible Surveys Date: Thursday, May 29th, 18:00 – 20:00 CET (Rome, Berlin, Paris timezone) Speaker: ... [Read more...]
sumdiff: Sum Minus Difference
Exercise template for a very basic arithmetic task, namely computing the sum of two random numbers minus their difference.
Name:
sumdiff
Type:
num
Related: deriv
Preview:
By how much is the sum of the ...
Announcing… schematic
I’m thrilled to announce the release of schematic, an R package that helps you (the developer) communicate data validation problems to non-technical users. With schematic, you can leverage tidyselect selectors and other conveniences to compare i... [Read more...]
How the DSGE sausage is made
Introduction
Dynamic Stochastic General Equilibrium (DSGE) models are a class of models which attempt to model the entire economy of a nation. The purpose of this post is to hand-code a DSGE model in R, fit it to data, and check that the results agree...
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