Johan Larsson

Ten years ago I wrote eulerr as part of my Bachelor’s thesis (Larsson 2018) in statistics—an R package for area-proportional Euler diagrams.

Tip A research paper describing Basin has now been published on arXiv (Larsson 2026), which describes the motivation and design of Basin in a bit more detail than this blog post.

Introduction I have on-and-off been a user of the Pomodoro technique, which is based on splitting your work day into increments of, typically, 25-minute work sessions followed by 5-minute breaks, repeated say, four times, and then followed by a longer, 15…

Tip Moloch has now been published in TUGboat (Larsson and samcarter 2026)!

Qualpal(r) It is now nine years since I first blogged about my pet project Qualpal (at that point called qualpalr), which is an R package for generating qualitative color palettes for data visualization in R.

It seems that I am on a lucky streak!

I am very happy to have just heard that my thesis was selected for the 2025 Cramér Prize for best thesis in statistics defended in 2024!

The Lasso, Elastic Net, and Ridge Regression Tip The paper has now been published in Transactions on Machine Learning Research (TMLR)!

Tip Moloch has now been published in TUGboat (Larsson and samcarter 2026)!

Spoiler alert: I passed my defense!

I have created my first Julia package!

Introduction to SLOPE SLOPE (Bogdan et al. 2015) stands for sorted L1 penalized estimation and is a generalization of OSCAR (Bondell and Reich 2008).

Labeling Euler diagram overlaps The purpose of my R package eulerr is to fit and visualize Euler diagrams.

My R package qualpalr selects qualitative colors by projecting a bunch of colors (as points) to the three-dimensional DIN99d color space wherein the distance between any pair colors approximate their differences in appearance.

eulerr is an R package that generates area-proportional euler diagrams to display set relationships (intersections, unions, and disjoints) with circles.

Introduction With the advent of colorbrewer there now exists good options to generate color palettes for sequential, diverging, and qualitative data.