iiinova — where your digital self keeps evolving

Reposted by David Kouřil

Kari Lavikka @karilavikka.fi · 28/07/2026

I recently added a parameterizable arrow mark to GenomeSpy, my open-source toolkit for interactive genomic data visualization, and implemented a couple of fancy examples to showcase it. (1/3)

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Reposted by David Kouřil

Cult.Repo @cultrepo.bsky.social · 18/06/2026

Is there such a thing as the Vienna School of Agentic Coding? Find out in our latest mini-doc, featuring Mario Zechner @mariozechner.at and Armin Ronacher @mitsuhiko.at Watch it in full here: youtu.be/5mgde2Br4ik

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David Kouřil @dvdkouril.xyz · 13/06/2026

“But if every ambitious person treats Europe as a lost cause, then Europe becomes one. If everyone with agency leaves, the only people left to shape the system are the people most comfortable with the system as it is.”

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Reposted by David Kouřil

Daniel Jalkut @danielpunkass.punkitup.com · 26/05/2026

My take on AI is, essentially, everybody who’s against is too against it and everybody who’s for it is too for it.

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Reposted by David Kouřil

Jakob Troidl @jakobtroidl.bsky.social · 27/05/2026

📢 We're recruiting AI Scientists at HHMI Janelia. I'm biased, but these are exceptional opportunities. You'd join as an independent scientist with access to excellent computational infrastructure, some of the best biological data in the world, and a vibrant collaborative environment.

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David Kouřil @dvdkouril.xyz · 23/04/2026

work in progress: made uchimata (github.com/hms-dbmi/uch...) into a Mosaic client, so that I can hook it up with quak (github.com/manzt/quak) for some nice brushing action

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David Kouřil @dvdkouril.xyz · 04/04/2026

If you've ever been confused about what's the difference between multiple coordinated views, linked views, brushing and linking....you're not alone, there's two of us! I wrote up my notes from researching the terminology around this key visualization concept.

vismarginalia.leaflet.pub

What should we actually call linked views in data visualization? - Marginal notes on visualization

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David Kouřil @dvdkouril.xyz · 29/03/2026

this is what peak productivity in 2026 looks like.

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Reposted by David Kouřil

trevor manz @manzt.sh · 25/03/2026

Introducing quiver: a (type-safe) place to keep your arrows @arrow.apache.org quiver is a small schema library for Arrow, built on @idl.uw.edu flechette - Define table schemas in TS - Validate schemas at IPC parse time - Get back fully typed Tables (no type-casting) github.com/manzt/quiver

Code snippet showing quiver's API: import quiver, define a table schema with int32, nullable utf8, and float64 columns, then call parseIPC on bytes. Accessing row values returns fully typed results — name is string | null, score is number.

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David Kouřil @dvdkouril.xyz · 13/03/2026

my wife **really** wants one of these trader joe’s tote bags. that’s what vibe coding is for.

screenshot of a website that summarizes web search results to see whether trader joe’s tote bags are out in stores or not

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David Kouřil @dvdkouril.xyz · 08/03/2026

Released an initial version of scattered (github.com/dvdkouril/sc...), a 3D scatterplot library for the web and computational notebooks. Core ideas: - webgpu-based rendering - arrow/dataframe as input - minimal dependencies and small bundle size - available as a JS package and a Python widget

github.com

GitHub - dvdkouril/scattered: 3D scatterplots in notebooks and on web

3D scatterplots in notebooks and on web. Contribute to dvdkouril/scattered development by creating an account on GitHub.

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David Kouřil @dvdkouril.xyz · 27/02/2026

playing around with umap-js today.

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David Kouřil @dvdkouril.xyz · 24/02/2026

A nice use case for Claude Code in my work: reviving old research prototypes. When it comes to surveying interactive features of past tools, we often have to rely on static figures and descriptions in text. Sometimes there’s a video. That can be pretty limiting.

A screenshot of a paper figure with caption. Highlighted text in the caption reads "Pink arrowheads indicate the 2D to 3D mapping of the highlighted region in Hi-C heat map on the 3D model. The green arrowhead indicats the 2D to 1D mapping of the selected region in 1D yeast genome (shown in orange for the recently selected region). Each selected region will be mapped to an individual 1D genome."

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David Kouřil @dvdkouril.xyz · 23/02/2026

we’ve got some selections going!

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David Kouřil @dvdkouril.xyz · 22/02/2026

revisiting my webgpu-based 3D scatterplot library after a year.

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David Kouřil @dvdkouril.xyz · 18/02/2026

Just so you know: if you delete your twitter/x account, it will come back up at some point, and show that it’s been active from an arbitrary, impossible date. Reporting impersonation is also useless.

A screenshot of email conversation with X Support, showing that I reported Impersonation on this account. All the options are irrelevant as they are concerned with restoring my account.

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David Kouřil @dvdkouril.xyz · 08/02/2026

TIL that Advent of Code was invented in Salem, Massachusetts www.youtube.com/watch?v=uZ8D...

youtube.com

Keynote: Advent of Code, Behind the Scenes - Eric Wastl

YouTube video by CppNorth

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David Kouřil @dvdkouril.xyz · 08/02/2026

i can’t be the only one who procrastinates on work by making tools for tracking and visualizing work

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David Kouřil @dvdkouril.xyz · 26/01/2026

haven’t seen that much snow in a while!

larger street covered in snow, a snow plowing truck approaching an intersection

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David Kouřil @dvdkouril.xyz · 05/01/2026

Made a little visualization of my workouts from last year.

a calendar view of 2025, divided by months. each day is color coded based on exercise type or gray which means no exercising that day

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Reposted by David Kouřil

John Alexis Guerra Gomez @johnguerra.bsky.social · 02/11/2025

My #IEEEVIS 2025 paper explorer is live! 🎉 👉 johnguerra.co/viz/ieeevis2... 👈 An interactive #dataviz to explore 300+ papers by similarity. Perfect for: ✨ Discovering papers related to your interests ✨ Planning which sessions to attend ✨ Creating your own paper list (new!) Pls help me distribute it

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Reposted by David Kouřil

Jon Bois @jonbois.bsky.social · 15/10/2025

after spending all year behind the paywall, part 1 of my documentary series FOOL TIME is now unlocked and free to watch for everybody: www.patreon.com/posts/fool-t...

patreon.com

FOOL TIME, Part 1 of 4 | Pretty Good | Secret Base

Get more from Secret Base on Patreon

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Reposted by David Kouřil

trevor manz @manzt.sh · 07/08/2025

if interested in creating anywidgets of your own, our tutorial was finally shared to youtube: www.youtube.com/watch?v=frEo...

youtube.com

Abdennur, Lekschas, & Manz - Bring your __repr__’s to life with anywidget | SciPy 2024

YouTube video by SciPy

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David Kouřil @dvdkouril.xyz · 25/07/2025

I have been playing with filtering of 3D structures (represented as Arrow tables) via duckdb-wasm… It’s been going pretty well!

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David Kouřil @dvdkouril.xyz · 13/06/2025

not completely done reading it yet, but this is definitely one of my favorite survey papers: onlinelibrary.wiley.com/doi/10.1111/... interactive browser: uclab.fh-potsdam.de/unfoldables/ @uclab.bsky.social

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David Kouřil @dvdkouril.xyz · 23/05/2025

totally unrelated to anything happening these days, but I now have a CV on my webpage: davidkouril.com/cv

screenshot of a browser window showing an online CV

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David Kouřil @dvdkouril.xyz · 18/05/2025

“boy do I have some bad news for you…this is gonna be a pie chart” reproduced this beauty from @jonbois.bsky.social

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David Kouřil @dvdkouril.xyz · 05/04/2025

watch out, trevor’s about to drop some knowledge, now in a blog form

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Reposted by David Kouřil

trevor manz @manzt.sh · 01/04/2025

i explored +130k artworks from the National Gallery of Art with polars, observableplot, anywidget, react... turns out there’s some neat public works history hiding in there. maybe you’ll find an (CC0!) upgrade for that default OS wallpaper 🙃

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Reposted by David Kouřil

trevor manz @manzt.sh · 11/03/2025

one of the first things I add to any ts project now is an `assert` utility: manzt.sh/assert.js type assertions (`foo as string`) blindly tell the type checker you know more than it does. `assert` is a real runtime check with the same narrowing effect. you'll thank me later when debugging!

A TypeScript example comparing type assertions vs. runtime assertions. The first approach (value as number) blindly tells the type checker that value is a number, risking runtime errors if it's null. The second approach uses an assert function to enforce the check at runtime, ensuring value is actually a number before proceeding.

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David Kouřil @dvdkouril.xyz · 10/02/2025

this is pretty much as good as computer graphics gets. #webgpu

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Reposted by David Kouřil

Nezar Abdennur @nvictus.bsky.social · 06/02/2025

A belated ode to 2024! lifeinbytes.substack.com/p/year-in-re...

lifeinbytes.substack.com

Year in Review

Code and composition in 2024

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Reposted by David Kouřil

Mark @mkeller7.bsky.social · 29/01/2025

We systematically analyzed the visualizations used in 1,846 subfigures from 45 human single-cell atlas publications in a survey on The State of Single-Cell Atlas Data Visualization in the Biological Literature. 📝: osf.io/preprints/os... 🔍: keller-mark.github.io/sc-star-site/

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David Kouřil @dvdkouril.xyz · 23/01/2025

some children books are very relatable

drawing of a child face-planted on the ground with a bubble saying “no”

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David Kouřil @dvdkouril.xyz · 15/01/2025

recorded a video about anywidget :) touches on how to develop in the early prototyping stage, when both the JS and Python parts change often www.youtube.com/watch?v=yL1k... @manzt.sh

youtube.com

anywidget setup: developing both the library and the widget

YouTube video by David Kouřil

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Reposted by David Kouřil

trevor manz @manzt.sh · 15/01/2025

Released juv v0.3.0! 🎉 Brings uv's locking for standalone scripts to Jupyter notebooks. Lockfiles are embedded directly in metadata for self-contained, reproducible notebooks. - `juv lock` generates a lockfile - `juv tree` shows dependencies - `juv export` outputs pip-compatible format

printing out a lockfile in the terminal for a Jupyter notebook. Terminal command: cat Untitled.ipynb | jq -r '.metadata["uv.lock"]' | bat -l toml

`juv tree` example printing the dependency tree for a notebook

`juv export` command showing a pip-compatible lockfile for the notebook

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David Kouřil @dvdkouril.xyz · 07/01/2025

i’ve been working on rendering many (16+) scenes with threejs in a single page. the performance is…suboptimal.

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David Kouřil @dvdkouril.xyz · 15/12/2024

just got back from the 4D Nucleome annual meeting. always fun to be the one poster with fancy images but zero biological novelty (compared to the rest). folks couldn’t have been nicer and more welcoming though!

a man waiting for an elevator, taking a photo in a mirror with square parts in a way that covers his eyes

view of a lecture hall from a single seat, on the table there are some snacks, coffee, and an eink tablet

view from the airport, looks over an airplane behind prepared for boarding

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David Kouřil @dvdkouril.xyz · 08/12/2024

making something physical really forces you to appreciate how easy we have it in the software world, with all the undos and things.

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David Kouřil @dvdkouril.xyz · 27/11/2024

a surprisingly useful tool for paper reading, especially to quickly skim through a large number of publications! 8bitdo micro

hand holding a small bluetooth game controller

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David Kouřil @dvdkouril.xyz · 23/11/2024

i’ll start posting about work soon i promise

boston view from harvard bridge at sunset

boston view from harvard bridge at sunset, there are some boats there

boston view from harvard bridge again, this time rainy

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