The “Data Scientist” label served its purpose; it allowed us to signal a transition happening in our profession from using only applied mathematical statistical methods to something else, which now also involves the use of a subset of software engineering practices. This transition was mentioned back in 2010 by Deborah Nolan (...

Each time we use R to analyze data, we rely on the assumption that functions used produce correct results. If we can’t make this assumption, we have to spend a lot of time validating every nitty detail. Luckily, we don’t have to do ...

Vote for the Winner of Appsilon’s Internal Shiny Contest Election season has been stressful for everyone – this is your chance to vote on something a bit more light-hearted. At Appsilon, we wanted to prove that with the shiny.semantic open-source package, it’s possible to create a great looking ...

This post is part of a series on new features in RStudio 1.4, currently available as a preview release. Beautiful code themes and rainbow parentheses, a tale as old as…well at least 2017. Being able to color your parentheses (and brackets and b...

Well, it’s election day here in America and the last thing in the world I want to talk about is politics. Hope you found a way to vote. Meanwhile, while we wait let me (hopefully) amuse and perhaps educate you with some information about another topic that we all ...

The Riddler of 16 October had the following puzzle: Take a real number θ uniformly distributed over (0,100). Among three players, the winner is whoever guessed the closest price without going over θ. In the event all guesses exceeded θ, the contestant with the lowest (and therefore closest) guess is declared the winner. The second […]

Background In the linear regression context, it is common to use the F-test to test whether a proposed regression model fits the data well. Say we have predictors, and we are comparing the model fit for Linear regression where are … Continue reading →

Hi, the third part is not yet available. I will post a link here once pubslished.