February 2011

Revolution in the News

February 8, 2011 | David Smith

Between the recent launch of Revolution R Enterprise 4.2 and the announcement of the SAS to R Challenge, there's been a flurry of recent news about Revolution Analytics and R in the media. Here's a quick recap: The Register's Timothy Prickett Morgan comments on the SAS to R Challenge: 'Red Hat ... [Read more...]

rjags 2.2.0 for Mac OS X

February 8, 2011 | Martyn

Version 2.2.0 of the rjags package for R is now available on CRAN. Previously, the version of rjags for Mac (2.1.0) was incompatible with the latest release of the JAGS library (2.2.0).  Let me know if you have any further … Continue reading → [Read more...]

4 and a half myths about beta in finance

February 8, 2011 | Pat

Much of what has been said and thought about beta in finance is untrue. Myth 1: beta is about volatility This myth is pervasive. Beta is associated with the stock’s volatility but there is more involved.  Beta is the ratio of the volatility of the stock to the volatility of ... [Read more...]

R courses from Statistics.com

February 7, 2011 | David Smith

If you're looking for some in-depth training in R, here are some upcoming courses presented by R gurus and hosted by statistics.com to consider: Feb 11: Modeling in R (Sudha Purohit -- more details after the jump) Mar 4: Introduction to R - Data Handling (Paul Murrell) Apr 15: Programming in R (... [Read more...]

Example 8.24: MplusAutomation and Mplus

February 7, 2011 | Nick Horton

In recent entries (here, here, and here), we've been fitting a series of latent class models using SAS and R. One of the most commonly used and powerful software package for latent class model estimation is Mplus. This commercial software includes su...
[Read more...]

R: Functions and environments and a debugging utility, oh my!

February 7, 2011 | Ari F.

The Mark Fredrickson blog has a superb post on R functions and environments that's well worth checking out.He also includes a handy function for debugging:__ fnpeek + env + if (is.null(name)) {+ return(ls(envir = env))+ }+ if (name %in% ls(envir = env)) {+ return(get(name, env))+ }+ return(NULL)+ }__ fnpeek(f1)[1] "... [Read more...]

Simple example:How to use foreach and doSNOW packages for parallel computation.

February 6, 2011 | teramonagi

update************************************************************************************************ I checked whether this example was run collectly or not in Windows XP(32bit) only !  ************************************************************************************************ In R language, the members at Revolution R provide foreach and doSNOW packages for parallel computation. these packages allow us to compute things in parallel. So, we start to install these packages. install.packages("... [Read more...]

Rhythms of Equality and Inequality

February 6, 2011 | Ethan Brown

Today I unveil my very first statistical YouTube video! I will do anything to keep you statisfied, and if that means YouTube, then so be it. But first, some exposition: In Panama, 10 percent of the population owned 45 percent of the income in 2000, whereas the bottom 10 percent owned only 0.6 percent. How [...] [Read more...]

Latent Gaussian Models im Zürich [day 2]

February 6, 2011 | xi'an

The second day at the Latent Gaussian Models workshop in Zürich was equally interesting. Among the morning talks, let me mention Daniel Bové who gave a talk connected with the hyper-g prior paper he wrote with Leo Held (commented in an earlier post) and the duo of Janine Illian ... [Read more...]

Clustering NHL Skaters

February 6, 2011 | --

I have been sitting on this post for some time now and wanted to get it out there.  The goal is to simply show how easy it is to pull live data from the web into R, massage it, and perform some analytics on it.  I am not sure how ... [Read more...]

Twitter Analysis using R

February 6, 2011 | Altons

One of the things that normally slow me down when I am learning a new tool outside working hours is the lack of an interesting project/task that forces me to investigate more about the sort of activities required to finish the project successfully. On ... [Read more...]

Peeking inside R functions

February 6, 2011 | Mark Fredrickson

R, like all good programming languages, treats functions as first class objects. Users can create functions, pass them as arguments, and have them returned as the result of other computations. You may be familiar with passing functions as arguments if you have used the apply family of functions (i.e. ... [Read more...]
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