packages

The problem with R? Too much new stuff!

August 23, 2011 | David Smith

In a tongue-in-cheek post at the Information Management blog, Steve Miller shares his "frustration" with R: package developers keep on releasing new functionality for R that makes his own work obsolete. For example, there's now pre-packaged functionality in R for enhanced dotplots, Economist-style graphics, additive regression models and more, which ... [Read more...]

useR! 2011 roundup

August 19, 2011 | David Smith

As I stand[*] here at Heathrow waiting for my flight back to the States, I thought I'd dash off a few quick reflections of the userR! 2011 conference at University Warwick. It was an outstanding event. There's something about a conference of just a few hundred attendees (there were about 450) that ... [Read more...]

Model Validation: Interpreting Residual Plots

July 18, 2011 | Daniel Hocking

When conducting any statistical analysis it is important to evaluate how well the model fits the data and that the data meet the assumptions of the model. There are numerous ways to do this and a variety of statistical tests to evaluate deviations from model assumptions. However, there is little ...
[Read more...]

Using R and Motion Charts to analyze financial data

July 15, 2011 | David Smith

We've noted before that with the RGoogleVis package, it's easy to make motion charts in R, and create a web-based interactive chart that reflects the synchronous movements of two or three variables over time. R user Jeffrey Breen has a great new blog post showing exactly how easy it is, ... [Read more...]

The R Journal: June 2011

June 24, 2011 | David Smith

The latest issue of the R Journal is out, and as always includes many useful articles about using R and R packages. Articles in Volume 3/1 dive into topics including creating test for R packages with test_that; dealing with times, time zones, dates and holidays with timeDate; social network analysis ... [Read more...]

Speed up R "for" loops 50x with Rcpp

June 23, 2011 | David Smith

Christian Gunning has a great example of using Rcpp to speed up a for loop in R. For his agent-based simulation, Christian needed to repeatedly call the rbinom function in a loop. (Unfortunately, you can't pass a vector to the size argument, which would have solved the problem.) Using the ... [Read more...]

R for Data Mining

June 6, 2011 | David Smith

Statistics and data mining often get bundled together, but (in my opinion), they're generally different practices with different goals. As a language designed for statistics, much of R's core functionality is focused on exploring and understanding data: model design, inference, and visualization. But when your goal is simply to get ... [Read more...]

Using R for Map-Reduce applications in Hadoop

May 4, 2011 | David Smith

Data Scientist Antonio Piccolboni recently published this comparison of the various language and interfaces available for programming Big Data analysis tasks in the map-reduce framework. The interfaces he reviewed included: Java Hadoop (mature and efficient, but verbose and difficult to program) Cascading (brings an SQL-like flavor to Java programming with ... [Read more...]

Slides and replay for PMML webinar

April 15, 2011 | David Smith

If you missed Wednesday's webinar on Deploying Predictive Analytics with Revolution R, PMML and ADAPA, the presentation slides and the replay (in WMV, reg. req'd) format are now available for download. Here are some additional references, from the closing slide: How Revolution R and ADAPA work together The PMML Package ... [Read more...]

Journal of Statistical Software. Vol. 40

April 12, 2011 | David Smith

The latest edition of the Journal of Statistical Software is out, with plenty of interesting articles for R users. A must-read is Hadley Wickham's article on "The Split-Apply-Combine Strategy for Data Analysis", which makes a compelling argument for the use of the plyr package to partition datasets and apply sub-group ... [Read more...]

“An R package” or “A R package”

March 26, 2011 | csgillespie

I’m currently writing some lecture notes on R and I used the phrase “a R package” without thinking. Since the word following the article “a” was a consonant, I automatically went for “a” instead of “an”. The problem is that “R” sounds likes a vowel, so “a R package” ... [Read more...]

Graphical Display of R Package Dependencies

March 23, 2011 | csgillespie

In some work that I am currently involved in, we have to decide which GUI engine we should use. As an obvious starter, we decided to have a look at what other people are using in their packages. While cran helpfully displays all the R packages that are available, it ... [Read more...]

Parallel processing in R for Windows

March 4, 2011 | David Smith

The doSMP package (and its companion package, revoIPC), previously bundled only with Revolution R, is now available on CRAN for use with open-source R under the GPL2 license. In short, doSMP makes it easy to do SMP parallel processing on a Windows box with multiple processors. (It works on Mac ... [Read more...]

Some R Package Updates

February 18, 2011 | David Smith

Packages for R are being added and updated so frequently now that it's tough to keep up with them all (the @CRANberriesFeed Twitter feed helps, though). But here are a couple of recent package updates that caught my eye: The Rcpp package for seamless integration between R and C++ has ... [Read more...]

A twitter feed for new R packages

January 24, 2011 | David Smith

Want to keep up-to-date on the latest R packages released to CRAN? Dirk Eddelbuettel's CRANberries service now tweets the release of new R packages to @CRANberriesFeed, so all you need to do is follow that user on Twitter. R hackers may also be interested to see how this Twitter feed ... [Read more...]

Create Motion Charts in R with the GoogleVis package

January 11, 2011 | David Smith

Hans Rosling popularized Motion Charts -- 2-d scatterplots that animate over time -- with the GapMinder project. Motion Charts were taken to their augmented-reality extreme in this clip from the BBC programme, The Joy of Stats, but now you can create similar (if less audacious) motion charts for yourself with ... [Read more...]
1 2 3 4 5

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)