Photo by Nathan Dumlao on Unsplash This is the first in a short series of blogs on package management. Registration for our webinar on Managing Packages for Open-Source Data Science on February 17 is now open. Absolutely essential, easy to forget if ...

This article illustrates how ordinary differential equations and multivariate observations can be modelled and fitted with the brms package (Bürkner (2017)) in R1. As an example I will use the well known Lotka-Volterra model (Lotka (1925), Volterra...

Our last post parsed portfolio optimization outputs and examined some of the nuances around the efficient frontier. We noted that when you start building portfolios with a large number of assets, brute force simulation can miss the optimal weighting scheme for a given return or risk profile. While optimization finds ...

State legislative election results Summarizing election results Historical vote distributions Seats-votes curves Resources Some notes on mean-median & partisan bias scores, and building seats-votes curves using lower house state legislative election results in the USA from 1971-2018. Also a place to organize some different non-geographical approaches to identifying partisan gerrymandering – eg – ...

The latest riddle from The Riddler was both straightforward: given four iid Normal variates, X¹,X²,X³,X⁴, what is the probability that X¹+X²

beakr is a lightweight and flexible web framework that allows you to incorporate R code as the Middleware responsible for handling web requests. At Mazama Science, we developed beakr to simplify the process of creating R-based web services that we use to deliver a variety of products: data files, images, ...

The R Consortium is excited to announce the 2021 R User Group and Small Conference Support Program (RUGS). We give grants to help R groups around the world organize, share... The post The 2021 RUGS Program is Live! appeared first on R Consortium.

We roll out new features and improvements regularly on RStudio Cloud, typically every week or two. You can always view the list of significant new features on Cloud’s What’s New page, which you can access via the left hand navigator in Cloud. But to...

Correlations and negative bias We assume that you are quite familiar with the following problem. Consider a data set where the information is expressed in percentages or proportions. An example are household expenditures, given as average amounts (...

leaflegend is a package to extend the customization of legends for the leaflet package in R. The addLegend function provides some great out of the box legends based on the internal palette functions, but styling of the legend components has to be don...

A brief note on gerrymandering, and cracking and packing (see Warrington 2018 for a proper discussion). Specifically, a simple simulation demonstrating how gross partisan asymmetries in state legislatures can be crafted from perfectly symmetrical statewide populations. Per function below, we designate individuals in a population of N voters as either Republican ...

The fifty-five videos from last month’s rstudio::global conference are now available online. You will find them at the link above arranged in ten categories (Keynotes, Data for Good, Language Interop, Learning, Modeling, Organizational Tooling, Package Dev, Programming, Teaching, and Visualization) that reflect fundamental areas of technical and community ...

This article translates Daniel Falbel’s ‘Simple Audio Classification’ article from tensorflow/keras to torch/torchaudio. The main goal is to introduce torchaudio and illustrate its contributions to the torch ecosystem. Here, we focus on a popular da...

Click to access birthday.pdf From an X validated question, found that WordPress now allows for direct link to pdf documents, like the above paper by my old friend Anirban Das Gupta! The question is about estimating a number M of individuals with N distinct birth dates over a year ...

Version 1.0.0 (and actually 1.0.1) of the R package 'networktree' with tools for recursively partitioning covariance structures is now available from CRAN, accompanied by a paper in Psychometrika, and a dedicated software web page. ...