Benchmarking bigglm

November 13, 2012 | Joseph Rickert

By Joseph Rickert In a recent blog post, David Smith reported on a talk that Steve Yun and I gave at STRATA in NYC about building and benchmarking Poisson GLM models on various platforms. The results presented showed that the rxGlm function from Revolution Analytics’ RevoScaleR package running on a ... [Read more...]

RStudio releases Shiny

November 12, 2012 | David Smith

RStudio has released a new package for R. Shiny allows R developers to build simple interactive Web-based interfaces for R scripts, using only R code (no JavaScript development required!). You can see some examples of Shiny in action in this blog post, and there are more details about Shiny's capabilities ... [Read more...]

New version of httr: 0.2

October 14, 2012 | hadleywickham

We’re happy to announce a new version of httr, a package designed to make it easy to work with web APIs. Httr is a wrapper around RCurl, and provides: functions for the most important http verbs: GET, HEAD, PATCH, PUT, DELETE and POST. automatic cookie handing across requests, connection ... [Read more...]

lubridate 1.2.0 now on CRAN

October 8, 2012 | Garrett.Grolemund

The latest version of lubridate offers some powerful new features and huge speed improvements. Some areas, such as date parsing are more than 50 times faster. lubridate 1.2.0 also fixes those pesky NA bugs in 1.1.0. Here’s some of what you’ll find: Parsers can now handle a wider variety date formats, ... [Read more...]

3-D animation of the changing Antarctic ice sheet

September 27, 2012 | David Smith

Last month we shared an visualization showing the changing extent of Arctic sea-ice. This visualization by the multinational Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) switches the view to the Southern pole and takes the visualization to a whole new level, by animating it in 3-D: The ... [Read more...]

New version of devtools: 0.8

September 16, 2012 | hadleywickham

We’re pleased to announce a new version of devtools, the package that makes R package development easy. The main features in this version are: A complete rewrite of the code loading system which simulates namespace loading much more accurately – this means using load_all is much closer to installing ... [Read more...]

Visualize complex data with subplots

September 14, 2012 | David Smith

Today's guest post comes from Garrett Grolemund, a software developer at RStudio — ed. I think of graphs as a type of visual summary for data. Yet I rarely see graphs used this way within visualizations. Consider tile plots. They group data into 2d bins and then summarize each group with ... [Read more...]

Integrate data and reporting on the Web with knitr

September 11, 2012 | David Smith

Today's guest post comes from Yihui Xie, author of the knitr package — ed. Hi, this is Yihui Xie, and I'm guest posting on the Revolutions blog to talk about one aspect of the knitr package: how we can integrate data analysis and reporting in R with the Web. This post ... [Read more...]

ggplot2 0.9.2 has been released!

September 7, 2012 | hadleywickham

The main changes in this version are to the theming system. There are also a number of enhancements to the theming system that make it easier to modify themes and we’ve renamed a number of functions to have more informative names. Your existing code should continue to work, although ... [Read more...]

RStan: Fast, multilevel Bayesian modeling in R

August 31, 2012 | David Smith

For the last decade or so, the go-to software for Bayesian statisticians has been BUGS (and later the open-source incarnation, OpenBugs, or JAGS). BUGS is used for multi-level modeling: using a specialized notation, you can define random variables of various distributions, set Bayesian priors for their parameters, and create the ... [Read more...]

Creating beautiful reports from R with knitr

August 21, 2012 | David Smith

People use the R language every day to create the elements of reports: tables, charts, analyses, and forecasts. But assembling all of that information into a print-ready document laid out with text can a hassle. You can cut-and-paste all of the elements into Word, but then what do you do ... [Read more...]

Getting Started with R and Hadoop

August 20, 2012 | David Smith

Last week's meeting of the Chicago area Hadoop User Group (a joint meeting the Chicago R User Group, and sponsored by Revolution Analytics) focused on crunching Big Data with R and Hadoop. Jeffrey Breen, president of Atmosphere Research Group, frequently deals with large data sets in his airline consulting work, ... [Read more...]

The top 10 critical packages on CRAN

August 8, 2012 | David Smith

While most R packages on CRAN are designed to be used by an R user directly, a few packages are designed to be used by other package developers. (And some packages are so useful that they're regularly used by both camps.) When a package author publishes a package to CRAN, ... [Read more...]

Faster R in Hadoop: rmr 1.3 now available

July 23, 2012 | David Smith

The RHadoop project continues the Big Data integration of R and Hadoop, with a new update to its rmr package. Version 1.3 of rmr improves the performance of map-reduce jobs for Hadoop written in R. New features include: An optional vectorized API for efficient R programming when dealing with small records. ... [Read more...]

R Journal, June 2012

July 20, 2012 | David Smith

The June 2012 issue of the R Journal, the peer-reviewed open-journal about R packages and applications of R, is now available. This issue includes articles about: Efficiently calling C functions from R without the need for wrapper code Using clusters of Macs running Apple Xgrid for parallel distributed processing with R ... [Read more...]

The R packages in a data scientist’s toolbox

July 17, 2012 | David Smith

John Myles White, self-described "statistics hacker" and co-author of "Machine Learning for Hackers" was interviewed recently by The Setup. In the interview, he describes his some of his go-to R packages for data science: Most of my work involves programming, so programming languages and their libraries are the bulk of ... [Read more...]

Using integer programming in R to optimize cargo loads

July 16, 2012 | David Smith

Linear Programming is a mathematical technique used to find the values of some variables (within the bounds of some defined constraints) to find the maximum value of a quantity. For example, consider this problem from the FishyOperations blog: A trading company is looking for a way to maximize profit per ... [Read more...]
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