Below are the slides for my Future: Simple Parallel and Distributed Processing in R that I presented at the useR! 2019 conference in Toulouse, France on July 9-12, 2019. My talk (25 slides; ~15+3 minutes): Title: Future: Simple Parallel and Dist...

Background The Collatz Conjecture is a famous unsolved problem in number theory. If you’re not familiar with it – the conjecture is very simple to understand, yet, no one has been able to mathematically prove that the conjecture is true (though it’s been shown to be true for an ...

“He felt that his whole life was some kind of dream and he sometimes wondered whose it was and whether they were enjoying it.” “The ships hung in the sky in much the same way that bricks don’t.” “We demand rigidly defined areas of doubt and uncertainty!” “For a ...

I was excited to start using Max Khun (creator of Caret’s) new set of ‘tidymodels’ packages - rsample, recipe, yardstick, parsnip and dials. These are still under development but seem promising. The one I have so far found most useful is recipe. Here I’ll give a quick overview ...

In our last post, we asked the simple question of whether an investor is better off being diversified if he or she doesn’t know in advance how a stock is likely to perform. We showed some graphs that suggested diversification lowered risk (or, more ...

In our last post, we asked the simple question of whether an investor is better off being diversified if he or she doesn’t know in advance how a stock is likely to perform. We showed some graphs that suggested diversification lowered risk (or, more precisely, volatility), but this came ...

I am tasked with explaining incredibly complex things to people who do not have a lot of time. Consequently, using visuals has been a life saver. One day I was visiting a school explaining the Common Eurpoean Framework of Reference for Languages, which, in a nutshell, describes what language learners ...

In our previous article , we showed that generalized linear models are unbiased, or calibrated: they preserve the conditional expectations and rollups of the training data. A calibrated model is important in many applications, particularly when financial data is involved. However, when making predictions on individuals, a biased model may be ...

This is the second part about my project that deals with the Twitter network of members of the Bundestag. After … Read More →

Intro In this post I’ll make an exception and instead of sharing my research I’ll chime in on the never ending “R vs Python” squabble. The tl;dr version is: R is superior to Python for doing data science If you’re a newcomer to data science yo...

Our 1-hour Call on Reproducible Research with R will include three speakers and 20 minutes for Q & A. Ben Marwick will introduce you to a research compendium, which accompanies, enhances, or is a scientific publication providin...

This post builds upon two earlier posts: Comparing Frequentist, Bayesian and Simulation methods and conclusions More Bayes and multiple comparisons Background This all started with a nice post from Anindya Mozumdar on the R Bloggers feed. The topic material was fun for me (analyzing the performance of male 100m sprinters ...

Intro In this post I’ll make an exception and instead of sharing my research I’ll chime in on the never ending “R vs Python” squabble. The tl;dr version is: R is superior to Python for doing data science If you’re a newcomer to data ...

Documentation matters ! Think about future you and others. Whatever is the aim of your script and analyses, you should think about documentation. The way I see it, R package structure is made for that. Let me try to convince you. At use’R 2019 in Toulouse, I did a presentation entitled: ‘...