Background When we started the Rcpp Gallery in late 2012, a few of us spent the next four weeks diligently writing articles ensuring that at least one new article would be posted per day. Two early articles covered the then-budding support for C++11. ... [Read more...]

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A new release 0.3.1 of the RPushbullet package, following the recent 0.3.0 release is now on CRAN. RPushbullet is interfacing the neat Pushbullet service for inter-device messaging, communication, and more. It lets you easily send alerts like the on... [Read more...]

In these terrible times, we R people have more important subjects to debate/care about than ggplot2 vs. base R graphics (isn’t even worth discussing anyway, ggplot2 is clearly the best alternative). Or so I thought until I saw CatterPlots trending on... [Read more...]

Armadillo is very versatile C++ library for linear algebra, brough to R via the RcppArmadillo package. It has proven to be very useful and popular, and is (as of February 2017) used by well over 300 CRAN packages as indicated by the reverse depends / ... [Read more...]

In these terrible times, we R people have more important subjects to debate/care about than ggplot2 vs. base R graphics (isn’t even worth discussing anyway, ggplot2 is clearly the best alternative). Or so I thought until I saw CatterPlots trending on... [Read more...]

Authors: Stefan Feuerriegel and Joscha Märkle-Huß R is widely taught in business courses and, hence, known by most data scientists with business background. However, when it comes to optimization and Operations Research, many other languages are used. Especially for optimization, solutions range from Microsoft Excel solvers to modeling environments ... [Read more...]

As a devotee of Tufte, I'm generally against chartjunk. Graphical elements that obscure interpretation of the data occasionally have a useful role to play, but more often than not that role is to entertain the expense of enlightenment, or worse, to actively mislead. So it's with mixed feelings that I ... [Read more...]

by Joseph Rickert As forecast, the number of R packages hosted on CRAN exceeded 10,000 in January. Dirk Eddelbuettel, who tracks what’s happening on CRAN with his CRANberries site, called hurricaneexposure the 10,000th package in a tweet on January 27th. hurricaneexposure was one of two hundred and six new packages ... [Read more...]

Following on from Part 1 of this two-part post, I would now like to explain how the Naive Bayes classifier works before applying it to a classification problem involving breast cancer data. The dataset is sourced from Matjaz Zwitter and Milan Soklic from the Institute of Oncology, University Medical Center in ... [Read more...]

Introduction A very useful machine learning method which, for its simplicity, is incredibly successful in many real world applications is the Naive Bayes classifier. I am currently taking a machine learning module as part of my data science college course and this week’s practical work involved a classification problem ... [Read more...]

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What is jailbreakr The jailbreakr package is probably one of the most interesting packages I came across recently. This package makes it possible to extract messy data from spreadsheets. What is meant by messy? I am sure you already had to deal with spreadsheets that contained little tables inside a ... [Read more...]

What is jailbreakr The jailbreakr package is probably one of the most interesting packages I came across recently. This package makes it possible to extract messy data from spreadsheets. What is meant by messy? I am sure you already had to deal with spreadsheets that contained little tables inside a ... [Read more...]

Moving around sparse matrices of text data - the limitations of as.h2o This post is the resolution of a challenge I first wrote about in late 2016, moving large sparse data from an R environment onto an H2O cluster for machine learning purposes. In th... [Read more...]

Our Community Call on Tuesday, March 7th, 8-9 AM PST, will cover "How to ask questions so they get answered! Possibly by yourself!". Asking questions about programming is a skill you can develop - we're not just born with it. The speakers will cover some of the background and skills ... [Read more...]

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