Welcome to the fourth post in the repulsively random R ramblings series, or R4 for short. My twitter feed was buzzing about a nice (and as yet unpublished, ie not-on-CRAN) package https://github.com/dirkschumacher/thankr by Dirk Schumacher which compiles a a list of packages (ordered by maintainer count) ... [Read more...]

Correlation analysis is one of the most popular techniques for data exploration. This set of exercises is intended to help you to extend, speed up, and validate your correlation analysis. It allows to practice in: – calculating linear and nonlinear correlation coefficients, – testing those coefficients for statistical significance, – creating correlation matrices ... [Read more...]

This post jots down some playing around with the pros, cons and limits of propensity score matching or weighting for causal social science research. Intro to propensity score matching One is often faced with an analytical question about causality and effect sizes when the only data around is from a ... [Read more...]

Abstract The rwml-R Github repo is updated with R code for the event modeling examples from Chapter 5 of the book “Real-World Machine Learning” by Henrik Brink, Joseph W. Richards, and Mark Fetherolf. Examples given include reading large data files with the fread function from data.table, optimization of model parameters ... [Read more...]

Nicolas Proellochs and Stefan Feuerriegel 2017-04-06 Introduction Reinforcement learning has recently gained a great deal of traction in studies that call for human-like learning. In settings where an explicit teacher is not available, this method teaches an agent via interaction with its environment without any supervision other than its ... [Read more...]

Recently a reader left a comment on this blog mentioning his cool blog post in which he mapped the spread of a migratory bird using Twitter. His data source was the Waxwings UK account which reports sightings of Bohemian waxwings in the UK. I decided t... [Read more...]

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We are happy to bring the slick JavaScript library to R. It is self-described as “the last carousel you’ll ever need”. This carousel is based on putting the elements of the carousel in a div HTML tag. This makes the carousel very versatile in what can be placed inside. ... [Read more...]

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Maëlle Salmon recently created a collage of profile pictures of people who use the #rstats hashtag in their Twitter bio to indicate their use of R. (I've included a detail below; click to see the complete version at Maëlle's blog.) Naturally, Maëlle created the collage using R ... [Read more...]

07.04.2017 A new release of Bio7 is available for Windows (64-bit) and Linux (64-bit). The MacOSX version will be released soon, too. This release comes with a plethora of new functions for R. General Bio7 is now based on Eclipse 4.6.3 Redesigned all Bio7 icons and created new icons, too Nearly all ... [Read more...]

RStudio is a great way to work through analyses tasks, and I suspect most folks use the “desktop” version of the product on their local workstations. The fine folks at RStudio also make a server version (the codebase for RStudio is able to generate server or desktop and they are ... [Read more...]

R Programming has various Data Structures for efficient manipulation of Data. Following are the list of data structures supported by R. 1. Vectors 2. Lists 3. Matrix 4. Data frame This exercise helps through various operations of R Data structures. Answers to the exercises are available here. Exercise 1 Create an atomic vector of Character […] ... [Read more...]

Share This: 1. Overview In the previous post (here), we have analyzed the performance gain of R in the heterogeneous system by accelerators, including NVIDIA GPU and Intel Xeon Phi. Furthermore, GPU accelerated packages can greatly improve the performance of R. Figure 1 shows the download statistics of CRAN over the years. ... [Read more...]

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This little function returns the vector of each word found before the end of a sentence. I ended up writing this for a pet project…Continue ReadingReturn a Vector of Each Word Found Before the End of a Sentence [Read more...]

Welcome to the third post in the rarely relevant R recommendation series, or R4 for short. Today will be brief, but of some importance. In order to know where R is going next, few places provide a better vantage point than the actual ongoing developm... [Read more...]

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