Data-driven storytelling
Everybody can use Excel, but creating a web-based data-driven story requires professional developers, if not a team. I'm working on making data-driven storytelling easier, more open and reproducible.
The Gamma is a research project to build tools that easily integrate with modern data sources (open government data, public online sources) and let users easily create visualizations that are directly linked to the data, making the visualizations more transparent, reproducible, but also easy to adapt to explore other aspects of the data.
- Visualizing Olympic medalists is a demo that shows how such open data-driven articles could look like. It lets explores the history of Olympic medals.
- Computation + Journalism 2015 paper about an earlier prototype describes ideas and motivations of the project in more details. Watch a 15 minute demo or a 45 minute talk from StrangeLoop.
- The Gamma is on GitHub and everything is available under the MIT license. You can learn about the latest news on Twitter at @thegamma_net.
Trainings at fsharpWorks
I'm a frequent conference speaker, founding member of the F# Software Foundation author of C# and F# books and author of many definitive F# libraries. I have been Microsoft MVP since 2004 and used F# since early Microsoft Research versions.
Have you seen the F# testimonials and are you thinking how can your company also benefit from the safety, correctness, efficiency and faster time-to-market provided by F#?
- fsharpWorks trainings — At fsharpWorks, we love sharing our knowledge with your team and we offer a wide range of workshops. We created an online course about F# in Finance and Type Providers and we regularly run an in-person course Fast Track to F# in London. We offer all of these and more as on-site trainings too — just drop us an email!
- F# books and articles — I wrote Real World Functional Programming, which explains functional concepts using C# and F#, edited a collection of F# case studies: F# Deep Dives and also wrote a free O'Reilly report: Analyzing and Visualizing Data with F#.
Coeffects and research
I recently submitted my PhD thesis at University of Cambridge and I closely collaborate with the F# team in Microsoft Research Cambridge.
My recent publications cover a range of topics from theory of context-aware programming, F# and type providers to language extensions for concurrent, reactive and asynchronous programming.
- Coeffects playgrouund is an interactive essay that lets you explore my PhD research in an accessible and fun way. You can read more in our ICFP 2014 paper.
- Academic web page has links to other published papers, work-in-progress drafts, research talks and also information about student projects and courses that I supervised.
Philosophy of science
During my (computer science) PhD, I became interested in how programming language research is done and how it should be done. We tend to think that science has infallible methods for discovering the truth, but is that the case? Or is science more 'sloppy' and 'irrational' than its methodological image as Paul Feyerabend says?
- History and philosophy of types is my most recent work in this area. It uses types as an example of a concept that appears simple, but is (and needs to be) more complex. Watch my LambdaDays talk or read the full-length Onward! essay.
- Philosophy posts on my blog — start with philosophy and history books every computer scientist should read and come to some of the events organized by the HaPoC Comission.
What I'm doing — latest blogs & publications
Would aliens understand lambda calculus?
Tuesday, 22 May 2018, 10:27 AM
Unless you are a sci-fi author or some secret government agency, the question whether aliens would understand lambda calculus is probably not your main practical concern. However, the question is intriguing because it nicely vividly formulates a fundamental question about our formal mathematical knowledge. Are mathematical theories and results about them invented, i.e. constructed by humans, or discovered, i.e. are they eternal truths that exist regardless of whether there are humans to know them?
The question makes for a fantastic late night pub debate, but how can we go about answering it using a more serious methodology? Is there a paper one can read to better understand the problem? Occasionally, a talk or an online comment by a computer scientist comments on this question, but way too often, people miss the fact that the nature of mathematical entities is one of the fundamental questions of philosophy of mathematics. Alas, all those discussions are carefully hidden in the humanities department!
I believe that knowing a bit about philosophy of mathematics is important if we want to have a meaningful debate about philosophical questions of mathematics (sic!) and so I did a talk on this very subject at CodeMesh 2017. This article is slightly refined and hopefully more polished version of the talk for those who, like me, prefer reading over watching. Keep in mind that the question about the nature of mathematical entities is one of the fundamental questions of an entire academic discipline. As such, this article cannot possibly cover all the relevant discussions. Compared to some other writings in this space, this article is, at least, based on a couple of philosophical books that, I believe, have useful things to say on the subject!
More writing on my blog
Here you'll find what I'm working on — my blog posts tend to be either updates about projects I'm working on, trainings and talks I'm doing, or longer posts that are early versions of my ideas — some of them become papers, some of them have been cited in other papers, some will be soon forgotten.
The design side of programming language design
Tuesday, 12 September 2017, 5:42 PM
The word design is often used when talking about programming languages. In fact, it even made it into the name of one of the most prestigious academic programming conferences. Yet, it is almost impossible to come across a paper about programming languages that uses design methods to study its subject. In this article, I want to convince you that this is a missed opportunity.
Getting started with The Gamma just got easier
Wednesday, 14 June 2017, 1:27 PM
Create open visualizations in four steps. The Gamma aims to make it easier to create transparent data visualizations that let the reader explore data further. Until today, getting started with The Gamma was tricky, because you had to provide data via a REST service. The new Gallery makes it easy to upload your own CSV file or paste data from Excel and it also guides you through the process and lets you easily embed the results into your blog. If you were curious about The Gamma, now you can start using it!
Papers we Scrutinize: How to critically read papers
Wednesday, 12 April 2017, 2:05 PM
It is very easy to see academic papers as containing eternal and unquestionable truths, rather than as something that the reader should actively interact with. I recently remarked about this saying that just reading papers is too passive. In this blog post, I try to uncover some of the caveats when reading papers - how we misread history and ignore historical context in which paper was written. I discuss different ways of reading papers and suggest a more active way of reading.
The mythology of programming language ideas
Tuesday, 7 March 2017, 3:31 PM
What can computer science learn from the fantastically wrong theories of 16th century science? What is amazing about the old stories is that the conclusions that now seem funny often had very solid reasoning behind them. In the same way, it is likely that some of our current beliefs about computer science and programming will appear fantastically wrong to a computer scientist of 24th century.
Towards open and transparent data-driven storytelling: Notes from my Alan Turing Institute talk
Thursday, 2 March 2017, 11:53 AM
Can open and engaging data visualizations help to fight post-fact world, fake news and the decreasing interest and trust in statistics? I recently gave a talk about my work on programming tools for open, transparent data-driven storytelling at the Alan Turing Institute in London. You can watch the talk on YouTube, but if you prefer text, this blog post is a short summary of the key ideas.
Academic publications
I published papers about programming languages including type providers, theory of coeffects, concurrent and reactive programming, but also philosophy and history of programming. My academic page has a complete list, including teaching and other activities.
Wrattler: Reproducible, live and polyglot notebooks
Tomas Petricek, James Geddes, Charles Sutton. In Proceedings of TaPP 2018
Notebook systems such as Jupyter are a popular environment for data science, but they use an architecture that leads to a limited model of interaction and makes versioning and reproducibility difficult. Wrattler revisits the architecture and allows richer forms of interactivity, efficient evaluation and guaranteed reproducibility.
What we talk about when we talk about monads
Tomas Petricek. The Art, Science, and Engineering of Programming, 2018
Computer science provides an in-depth understanding of technical aspects of programming concepts, but if we want to understand how programming concepts evolve, how programmers think about them and how they are used in practice, we need to consider a broader perspective. This paper explains how computer scientists and programmers talk about monads and why they do so.
Design and implementation of a live coding environment for data science
Tomas Petricek. Unpublished draft.
Data science can be done by directly manipulating data using spreadsheets, or by writing data manipulation scripts using a programming language. The former is error-prone and does not scale, while the latter requires expert skills. Live coding has the potential to bridge this gap and make writing of transparent, reproducible scripts more accessible.