We've just launched a beta/preview of a new website for the R community, inside-R.org. The site is sponsored by Revolution Analytics (who funded its development and maintenance), but it's designed for anyone who uses or has in an interest in the R Project generally. So, you might ask, why another community site for R, when there's already several R...
Glancing perchance at the back of my Amstat News, I was intrigued by the SAS advertisement Bayesian Methods Specify Bayesian analysis for ANOVA, logistic regression, Poisson regression, accelerated failure time models and Cox regression through the GENMOD, LIFEREG and PHREG procedures. Analyze a wider variety of models with the MCMC procedure, a general purpose Bayesian 
Needed this one recently, it pops up a window to pick a file to be used by r, then reads the contents into myData: myFile
J. D. Long will be giving an introduction to R - how he got into it when doing data analysis and what drew him to use it instead of complicated excel models.
Unlike Revolution R Community which is 100% free to everyone, our commercial-grade Revolution R Enterprise distribution bundles R with proprietary components from our development team, which are normally available only to paying subscribers. (Those subscriptions are the way we get income to keep the company going.) Those components include our full ParallelR libraries for parallel programming, enhanced for 64-bit...
Creating reports is one of the basic tasks in data analysis. R provides numerous functions and packages to export it’s (beautiful) output and help compile it into a report. In this post I will present one such (basic) solution for Windows OS users for exporting R output into Microsoft Word using the R2wd (package). There are more ways and...
So, as you may have noticed from the new banner here at the blog, we've changed our name to Revolution Analytics. It's still the same company and the same people, and still focused around the R Project, but now with a fresh new look and lots of exciting news. I'll be blogging about our new academic program, our new...
There are many similarities between R and Ruby. - Learning both has been fun - "dude, i'm playing with R and love it." The excitement doesn't end!I'm totally addicted. - I keep discovering new and nifty things. Every time I hit an interesting pr...
A few weeks ago I covered an R package for efficient mixed model regression that is capable of simultaneously accounting for both population stratification and relatedness to compute unbiased estimates of standard errors and p-values for genetic associ...
I came up with a handy little trick for programming in R. I like to define a lot of variables all at once without worrying about what order they’re in. The goal would be something like this: K = -R2/R1 … Continue reading →
The mathematical puzzle in the latest weekend edition of Le Monde is as follows: Two kids are given three boxes of chocolates with a total of 32 pieces. Rather than sharing evenly, they play the following game: Each in turn, they pick one of the three boxes, empty its contents in a jar and pick 
Before I decided to learn R in a serious way, I thought about learning Flash/Actionscript instead. Most of my work involves evolutionary models that take place over time. I need visual representations of change. It’s certainly possible to represent change and tell an evolving story with a single plot (see for example Tufte’s favorite infographic),
Jeromy Anglim has just posted a nice round-up of instructional videos for learning R. The videos are categorized into four levels: What is R? Introductory R? Intermediate and Advanced Materials on R and Related Resources (including a link to written resources for getting started with R). Check out all the links at Jeromy's post, linked below. Jeromy Anglim's blog:...
I've seen K-means clustering, PCA, etc. done some over at Beyond the Boxscore and Baseball Analysts (and the now defunct Statspeak), but I thought I'd just check out some clustering on the young fantasy season using the traditional 5x5 categories with ...
If you want to learn about R through videos, there are now a large number of options. This post provides links to many of these video under the headings of: (a) What is R? (b) Introductory R, and (c) Intermediate and Advanced R. What is R?If you are...
If you want to learn about R through videos, there are now a large number of options.This post provides links to many of these video under the headings of:(a) What is R?(b) Introductory R, and(c) Intermediate and Advanced R.What is R?If you are evaluat...
In baseball, what are the chances the winner will win again against the same opponent the very next day?
Below is a walk-through of some of the basics of customizing plot in R. These are all based on the graphics package that comes in the base installation of R. Let’s start by making a basic plot in R. In the code snippets below, green text behind a...
An email from Keith I got this morning: Professor Robert, I have loaded the mcsm package to windows. The following messages appear in the R console: trying URL 'http://cran.stat.ucla.edu/bin/windows/contrib/2.9/mcsm_1.0.zip' Content type 'application/zip' length 193590 bytes (189 Kb) opened URL downloaded 189 Kb package 'mcsm' successfully unpacked and MD5 sums checked But when I use the 
The following fully-automatic Bash script downloads, compiles, and initializes compcache version 0.6.2 on Ubuntu Karmic Koala (9.10). This script creates two swaps with a maximum of 4GB uncompressed size each. Two swaps are used to take advantage of 2 CPUs (or CPU cores in a multicore CPU). Compcache is a fascinating memory compression system. The 
To start sending all output to a file, do this: sink("path/to/filename") # Direct all output to file print("Hi there") # Will be printed to file sink() # Turn off buffing to file Related to this I recently had to use: flush.console() This forces your console to print out any buffered content. Doing this will cost time, but if you are running
Wishing there was a local R User's group in your area, but can't find one? New user groups are springing up all the time, but you can kickstart the process by registering interest for a group in your area at meetup.com. As you can see from the map below, there's interest in many places -- your vote could prompt...
In the past few months, I've developed a set of functions for automating model estimation and interpretation using Mplus, an outstanding latent variable modeling program that has unparalleled flexibility for complex models (e.g., factor mixture models). I recently rolled these functions into an R package called MplusAutomation. Because the package focuses on extracting various parameters from text...
In the past few months, I've developed a set of functions for automating model estimation and interpretation using Mplus, an outstanding latent variable modeling program that has unparalleled flexibility for complex models (e.g., factor mixture models). I recently rolled these functions into an R package called MplusAutomation. Because the package focuses on extracting various parameters from text...
On Tuesday May 4th at 9:30 PM central, 10:30 eastern, I’ll be giving a live online presentation as part of the Vconf.org open conference series. I’ll be speaking about R and why I started using R a couple years ago. This is NOT going to be a technical presentation but rather an illustration of how
This guest article was written by author and consultant Tristan Yates (see his bio below). It emphasizes R’s data object manipulation and scoring capabilities via a detailed financial analysis example. Scoring and ranking systems are extremely valuable management tools. They can be used to predict the future, make decisions, and improve behavior – sometimes all
The post Building...
This guest article was written by author and consultant Tristan Yates (see his bio below). It emphasizes R's data object manipulation and scoring capabilities via a detailed financial analysis example. Scoring and ranking systems are extremely valuabl...
JD Long (of Cerebral Mastication fame) will be giving a live "virtual talk" introducing R: "What it's best at and how you can use it to help you massage data". The talk will be at 7:30PM Pacific time tomorrow, Tuesday May 4. You can register at the link below. vconf.org: Presentation: R The Language
$100 to the first person who can figure out how I created this plot and replicate it. Some hints: It was done in R. There is only one underlying probability distribution involved (one “rdist()“). Including the “plot” statement, I created this with 3 short lines of code. This is based on a random sampling of unstated size, so
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
