The fable package for doing tidy forecasting in R is now on CRAN. Like tsibble and feasts, it is also part of the tidyverts family of packages for analysing, modelling and forecasting many related time series (stored as tsibbles). For a brief introduction to tsibbles, see this post from last ...

Matt Grossmann noted the close relationship between the amount of news coverage candidates in the Democratic primary have been receiving and their polling numbers. Presidential candidate poll standing & prior week cable TV news share are correlated at .9Harris got a bump in news coverage after the 1st debate that faded ...

If you are reading this, you are probably a Ravenclaw. Or a Hufflepuff. Certainly not a Slytherin … but maybe a Gryffindor? In this blog post, we let three subjective Bayesians predict the outcome of ten coin flips. We will derive prior predictions, evaluate their accuracy, and see how fortune favours ...

Hi all, On top of recommending the excellent autobiography of Stanislaw Ulam, this post is about using the software Stan, but not directly to perform inference, instead to obtain R functions to evaluate a target’s probability density function and its gradient. With which, one can implement custom methods, while ...

Reddit is a popular website for opinion sharing and news aggregation. The site consists of thousands of user-made forums, called subreddits, which cover a broad range of subjects, including politics, sports, technology, personal hobbies, and self-improvement. Given that most Reddit users contribute to multiple subreddits, one might think of Reddit ...

I posted a visualization of email safety status (a.k.a. DMARC) of the Fortune 500 (2017 list) the other day on Twitter and received this spiffy request from @MarkAltosaar: Would you be willing to add the R code used to produce this to your vignette for ggchicklet? I would love to ...

Interviews are difficult for most people. You don't want to mess up during it, but you always think of a better response after-the-fact. Here are 101 data science interview questions with responses and suggestions from large tech companies like Amazon, Google, and Microsoft.

When studying regression models, One of the first diagnostic plots most students learn is to plot residuals versus the model’s predictions (that is, with the predictions on the x-axis). Here’s a basic example. # build an "ideal" linear process. set.seed(34524) N = 100 x1 = runif(N) x2 = runif(N) noise = 0.25*...

I helped run a conference last week. As part of this I produced a wordcloud from the conference abstracts, although pretty it could have been more informative of the conference content. This blog post shows you how to make a network of conference bi-grams.

This summer I was asked to collaborate on an analysis project with many response variables. As usual, I planned on automating my initial graphical data exploration through the use of functions and purrr::map() as I’ve written about previously. However, this particular project was a follow-up to a previous ...

There are some important benefits to applying early. Here are just a few reasons why you might want to reconsider procrastinating on your application.

These days, most people are familiar with the concept of A/B testing. This is one of the most common ways to make advertising decisions, particularly in online marketing. In an A/B test, the customer base is divided into two or more groups, each of which is served a ...