Profiling in R R has a built in performance and memory profiling facility: Rprof. Type [crayon-5755404797f32904591682-i/] into your console to learn more. The way the profiler works is as follows: you start the profiler by calling Rprof, providing a filename where the profiling data should be stored you ... [Read more...]

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Understanding data.table Rolling JoinsRobert NorbergJune 5, 2016IntroductionRolling joins in data.table are incredibly useful, but not that well documented. I wrote this to help myself figure out how to use them and perhaps it can help you too.

<span>library</span><span>(</span><span>data.table</span><span>)</span>

The SetupImagine we have an eCommerce website that uses a third ... [Read more...]

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Modelling strategies I’ve been re-reading Frank Harrell’s Regression Modelling Strategies, a must read for anyone who ever fits a regression model, although be prepared - depending on your background, you might get 30 pages in and suddenly become convinced you’ve been doing nearly everything wrong before, which can ... [Read more...]

Here is topic wise list of R tutorials for Data Science, Time Series Analysis, Natural Language Processing and Machine Learning. This list also serves as a reference guide for several common data analysis tasks. The R Language Awesome-R Repository on GitHub R Reference Card: Cheatsheet R bloggers: blog aggregator R ... [Read more...]

The bigmemory package offers a set of tools for R which allow for manipulation larger-than-memory objects within R. It has some basic functions but is certainly not comprehensive. The eigen C++ linear algebra library is a highly efficient numerical linear algebra library and can be interfaced to R through RcppEigen ... [Read more...]

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Data Science Central issued a challenge May 28th for readers to create a professional looking data video using R that conveys a useful message. [Read more...]

As more settlements in Texas and France are impacted by severe flooding, this is a good time to thank the hydrologists at the NOAA who forecast river level rises in advance and give residents in affected areas time to move to higher ground. Along with topgraphic, rainfall, and weather data, ... [Read more...]

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by Joseph Rickert The model table on the caret package website lists more that 200 variations of predictive analytics models that are available withing the caret framework. All of these models may be prepared, tuned, fit and evaluated with a common set of caret functions. All on its own, the table ... [Read more...]

We released a new version of methylKit, which is a package for DNA methylation analysis with bisulfite-seq data. This version comes with many changes summarized below. you can also have a look at the release notes. The vignette is now converted to HTML and also lives on rpubs.Working with ... [Read more...]

We released a new version of methylKit, which is a package for DNA methylation analysis with bisulfite-seq data. This version comes with many changes summarized below. you can also have a look at the release notes. The vignette is now converted to... [Read more...]

Recently I’ve been doing a lot of remote pair programming with clients. A few people have asked how this works. Rather than try to explain it, I recorded one of my sessions with a client last week, and you can watch it below: The actual session was about an ... [Read more...]