I gave a talk titled, “Parallel Computation in R:  What We Want, and How We (Might) Get It,” at last week’s useR! 2017 conference in Brussels. You can view my slides here, and I think the conference organizers said the videos would be placed online, not sure of that though. ... [Read more...]

Statistics are often taught in school by and for people who like Mathematics. As a consequence, in those class emphasis is put on leaning equations, solving calculus problems and creating mathematics models instead of building an intuition for probabilistic problems. But, if you read this, you know a bit of ... [Read more...]

Some time ago I published a blog post with the title Know your data structures!. In this previous post I explained how I improved the running time of a genetic algorithm. I promised to go more into detail about other noteworthy things in the code in a separate article since ... [Read more...]

After I wrote a couple of weeks back about state-space modelling of the Australian 2007 federal election, I received some very helpful feedback from Bob Carpenter, a Columbia University research scientist and one of the core developers of the Stan probabilistic language. Some of the amendments I made in response to ... [Read more...]

A new, and long overdue, release of xts is now on CRAN!  The major change is the completely new plot.xts() written by Michael Weylandt and Ross Bennett, and which is based on Jeff Ryan's quantmod::chart_Series code.Do note that the new plot.xts() includes breaking changes to ... [Read more...]

Holiday weekend, schmoliday weekend. Ben Goodrich and Jonah Gabry shipped RStan 2.16.2 (their numbering is a little beyond base Stan, which is at 2.16.0). This reintroduces error reporting that got lost in the 2.15 refactor, so please upgrade if you want to debug your Stan programs! Joe Haupt translated the JAGS examples in ... [Read more...]

Holiday weekend, schmoliday weekend. Ben Goodrich and Jonah Gabry shipped RStan 2.16.2 (their numbering is a little beyond base Stan, which is at 2.16.0). This reintroduces error reporting that got lost in the 2.15 refactor, so please upgrade if you want to debug your Stan programs! Joe Haupt translated the JAGS examples in ... [Read more...]

Earlier today, I presented at UseR! 2017 about HaskellR: a great piece of software, developed by Tweag I/O, that allows to seemlessly use R from Haskell. It was my first UseR!, it was a great experience, and if I had the time I’d like to write a separate blog ... [Read more...]

There has been some talk of adding native pipe notation to R (for example here, here, and here). I think a critical aspect of such an extension would be to treat such a notation as syntactic sugar and not insist such a pipe match magrittr semantics, or worse yet give ... [Read more...]

by Fang Zhou, Data Scientist; and Graham Williams, Director of Data Science, all at Microsoft Rattle — the R Analytical Tool To Learn Easily — is a popular open-source GUI for data mining using R. It presents statistical and visual summaries of data, transforms data that can be readily modelled, builds both ... [Read more...]

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I’m very pleased to announce that my new package tidygraph is now available on CRAN. As the name suggests, tidygraph is an entry into the tidyverse that provides a tidy framework for all things relational (networks/graphs, trees, etc.). tidygraph ... [Read more...]

In our latest R and Big Data article we discuss replyr. Why replyr replyr stands for REmote PLYing of big data for R. Why should R users try replyr? Because it lets you take a number of common working patterns and apply them to remote data (such as databases or ... [Read more...]

Introduction Shiny by RStudio is a web application framework targeted for R programmers. It allows our analysis to be extended as an interactive web application  that can be […] The post Motor vehicle collisions in New York City - R / Shiny Data Visualization appeared first on NYC Data Science Academy Blog. [Read more...]

Part 5 of 5 in the series Set TheoryOrdered and Unordered Pairs A pair set is a set with two members, for example, , which can also be thought of as an unordered pair, in that . However, we seek a more a strict and rich object that tells us... The post Set Theory ... [Read more...]

R has a lot of tools to speed up computations making use of multiple CPU cores either on one computer, or on multiple machines. This series of exercises aims to introduce the basic techniques for implementing parallel computations using multiple CPU cores on one machine. The initial step in preparation ... [Read more...]

In the first part of A pick of the best R packages for interactive plot and visualization, we saw the best packages to do interactive plot in R. Now, let’s see what are the best packages for interactive visualizations. While plots tend are representing ‘classic’ data. These plots have ... [Read more...]