Are you passionate about statistical methods and software? If so we would love for you to join our team to dig deep into the world of statistical software packages. You’ll develop standards for evaluating and reviewing statistical t...
In this post I'll introduce a simple investing strategy that is well diversified and has been shown to work across different markets. In short, buying cheap and uptrending stocks...
In the previous article in this series, we showed that common ensemble models like random forest and gradient boosting are uncalibrated: they are not guaranteed to estimate aggregates or...
For many R users, it’s obvious why you’d want to use R with big data, but not so obvious how. In fact, many people (wrongly) believe that R just...
Your one-stop-shop for machine learning algorithms. Each algorithm is complete with a short description and links to examples. If you would like to take the algorithms with you, click...
Joe Cheng presented shinymeta enabling reproducibility in shiny at useR in July 2019. I am really thankful for this. This article shows a… Continue reading on Towards Data Science »
The European R conference will visit Milan in 2020! Mirai Solutions is delighted to actively support and participate in the organization of the event. The European R Users Meeting (eRum)...
It can be argued that most important decisions in life are some variant of an exploitation-exploration problem. Shall I stick with my current job or look for a new...
Motivation After reading The Life Changing Magic of Tidying Text and A tidy text analysis of Rick and Morty I wanted to do something similar for Rick and Morty and...
In this post we will close the trilogy on (old style) swap pricing. In particular, we will look at how downloading the data for the variable rate needed to...
The grainchanger package provides functionality for data aggregation to a coarser resolution via moving-window or direct methods. Why do we need new methods for data aggregation? As landscape ecologists and macroecologists,...
In the last two posts, I introduced the notion of time-varying intra-cluster correlations in the context of stepped-wedge study designs. (See here and here). Though I generated lots of...
Despite being a full-on denizen of all things digital I receive a fair number of dead-tree print magazines as there’s nothing quite like seeing an amazing, large, full-color print...
by Bob Muenchen & Sean Mackinnon One of us (Muenchen) has been tracking The Popularity of Data Science Software using a variety of different approaches. One approach is to...
Very briefly: Last week was useR! conference time again, coming to you this time from Toulouse, France I’ve retrieved 8 318 tweets that mention #user2019 and run them through...
I recently learned how to use the choroplethr package through a short tutorial by the package author Ari Lamstein (youtube link here). To cement what I learned, I thought...
For some time I’ve wanted to recreate the cover art from Joy Division’s Unknown Pleasures album. The visualisation depicts successive pulses from the pulsar PSR B1919+21, discovered by Jocelyn...
My web scraping project explored the distribution of headline sentiment by news source. To do this, I scraped the Nasdaq latest market headlines page and applied sentiment analysis to...
We’re delighted to announce that we have received new funding from the Alfred P. Sloan Foundation. The $678K grant, awarded through the Foundation’s Data & Computational Research program, will...
Introduction This post will be taking a bit of an unexpected diversion. As I was experimenting with hierarchical clustering I ran into the issue of how many clusters to assume....
rstudio::conf, the conference for all things R and RStudio, will take place January 29 and 30, 2020 in San Francisco, California. It will be preceded by Training Days on...
Compared with other types of neural networks, General Regression Neural Network (Specht, 1991) is advantageous in several aspects. Being an universal approximation function, GRNN has only one tuning parameter...
The useR! 2019 held in Toulouse ended couple of days ago. I spoke of the recent R journal publication about forecast combinations (joint work with Christoph Weiss and Gernot...
While reading Dr. Nina Zumel’s excellent note on bias in common ensemble methods, I ran the examples to see the effects she described (and I think it is very important...
A. Background In previous posts, I covered a number of useful functions and packages for writing reusable code. I wanted to extend on that information by providing a working...
I’m back from useR! 2019!, Toulouse, where I gave one talk and a workshop. Here are the links to the materials. 2019-07-08 Contributing to the R ecosystem useR! newbie session A short...
Simulating data is an invaluable tool. I use simulations to conduct power analyses, probe how robust methods are to violating assumptions, and examine how different methods handle different types...
The {waffle} package got some 💙 this week and now has a substantially improved geom_waffle() along with a brand new sibling function geom_pictogram() which has all the powerful new...
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