Revolution in the News

July 27, 2010
By

Revolution's CEO Noman Nie has been busy recently spreading the good word about R and Revolution. Here's a quick roundup: In an audio interview with Mary Joe Nott at B-eye Network, Norman talks about the "perfect storm" around R, "the most complete statistical tool in the world". In Business Management magazine, Norman Nie describes how predictive analytics is changing...

Read more »

A summer of books

July 27, 2010
By
A summer of books

The summer started with a research in pair session in CiRM on the R edition of Bayesian Core, but I am also involved two other book projects. The first one was mentioned in a previous post, namely the translation of Introducing Monte Carlo Methods with R into French. I have now recovered all translated chapters,

Read more »

Hadley Wickham’s ggplot2 / Data Visualization Course Materials

July 27, 2010
By

Hadley Wickham, creator of ggplot2, an immensely popular framework for Tufte-friendly data visualization using R, is teaching two short courses at Vanderbilt this week. Once we opened registration to Vanderbilt students and staff we instantly filled al...

Read more »

Mystery solved: The discrepancy in homicide data

July 27, 2010
By
Mystery solved: The discrepancy in homicide data

I've been complaining about how homicide statistics from police sources were too low in 2009, with the entire state of Chihuahua having less homicides than its biggest city. I was thinking of finding out if I could use the IFAI (Freedom of Information Access) to obtain the original CIEISP forms which the state police forces are supposed to fill out each month...

Read more »

Mystery solved: The discrepancy in homicide data

July 27, 2010
By
Mystery solved: The discrepancy in homicide data

I've been complaining about how homicide statistics from police sources were too low in 2009, with the entire state of Chihuahua having less homicides than its biggest city. I was thinking of finding out if I could use the IFAI (Freedom of Information Access) to obtain the original CIEISP forms which the state police forces are supposed to fill out each month...

Read more »

useR! 2010

July 27, 2010
By

I was in useR! last week, it was great to catch up with friends, see what people are doing with R, tell people what I am doing with R, etc ... the conference was great This year I presented with Dirk in Laurel and Hardy mode and I've uploaded our ...

Read more »

rgeos – Update

July 27, 2010
By
rgeos – Update

So I have been remiss in posting updates of progress on rgeos as my summer has gotten busier but the project is progressing smoothly and everything is on schedule. We have just recently passed an important personal milestone, parsing and running of all the JTS unit tests are now working and the rgeos code passes

Read more »

Statistical Analysis StackExchange site now available

July 26, 2010
By
Statistical Analysis StackExchange site now available

The Q&A site for statistical analysis, data mining, data visualization, and everything else to do with data analysis has finally been launched. Please head over to stats.StackExchange.com and start asking and answering questions. Also, spread the word to everyone else who may be interested — work colleagues, students, etc. The more people who use the

Read more »

Hacker News User Base Changed?

July 26, 2010
By
Hacker News User Base Changed?

There are lots of references on Hacker news to the fact that the "good old days" are gone and that the character of the site has changed since it started.  The visualization above was based on a sample of users that posted on the site in recent ti...

Read more »

Rcpp 0.8.5

July 26, 2010
By

A new release (now at version 0.8.5) of Rcpp is now on CRAN and in Debian. This release constitutes a quick follow-up to the last release 0.8.4 which we got out just before CRAN closed for summer vacations. Some fixes were made right after last releas...

Read more »

Rcpp 0.8.5

July 26, 2010
By

A new release (now at version 0.8.5) of Rcpp is now on CRAN and in Debian. This release constitutes a quick follow-up to the last release 0.8.4 which we got out just before CRAN closed for summer vacations. Some fixes were made right after last rel...

Read more »

A tty Connection for R

July 26, 2010
By

I completed (some time ago) an initial version of a patch for R, version 2.11.1, that adds a POSIX tty connection. The patch is confirmed to compile and works on Mac OS X (thanks to Ashwin Bhat of Georgia Tech) and Debian GNU Linux. However, it should be portable to other POSIX compliant operating systems.

Read more »

Snapshots from useR! 2010

July 26, 2010
By
Snapshots from useR! 2010

I've still got more to write from days 2 and 3 of useR! 2010, but in the meantime here are a few snapshots from my camera roll. (Click on the images for larger versions.) Jeroen Ooms (left) chats with other useRs in the main hallway at NIST. Karim Chine demonstrates his Electric-R portal for R on Amazon's EC2 cloud....

Read more »

Extracting Raster Values from Points in R and GRASS

July 26, 2010
By

A common task in GIS analysis is to extract the value of a remotely sensed environmental variable at a point location. For instance we may wish to extract the elevation of a field plot from a digital elevation model. The elevation data is a raster (i.e. grid) and the plots are a point shapefile (or a simple text file of X,...

Read more »

Extracting Raster Values from Points in R and GRASS

July 26, 2010
By

A common task in GIS analysis is to extract the value of a remotely sensed environmental variable at a point location. For instance we may wish to extract the elevation of a field plot from a digital elevation model. The elevation data is a raster (i.e. grid) and the plots are a point shapefile (or a simple text file of X,...

Read more »

Richard Stallman talk+Q&A at the useR! 2010 conference (audio files attached)

July 26, 2010
By

The audio files of the full talk by Richard Stallman are attached to the end of this post. —————– Videos of all the invited talks of the useR! 2010 conference can be viewed on the R User Group blog —————– Last week I had the honor of attending the talk given by Richard Stallman, the last keynote speaker on...

Read more »

Using SAS for Data Management, Statistical Analysis, and Graphics

July 26, 2010
By
Using SAS for Data Management, Statistical Analysis, and Graphics

Our newest book, Using SAS for Data Management, Statistical Analysis and Graphics, will soon be shipping from Amazon, CRC Press, and other fine retailers. The book complements our SAS and R book, particularly for users less interested in R. It presen...

Read more »

New R User Group in Melbourne

July 26, 2010
By

Data mining analyst Yuval Marom has just started a new user group for users of R in Melbourne (the one in Australia). He says: The group is open to people with all levels of experience with R, including complete beginners and complete experts, and people from all industries - private, government, and academic. The main purpose of the group...

Read more »

R Plotting tips

July 26, 2010
By

Yes...I haven't been updating the blog for a very long while...But I'm really busy with many things right know.... Our paper for the "Cultural Evolution in Spatially Structured Populations" have been accepted so we are currently working on that, and I ...

Read more »

R Plotting tips

July 26, 2010
By

Yes...I haven't been updating the blog for a very long while...But I'm really busy with many things right know.... Our paper for the "Cultural Evolution in Spatially Structured Populations" have been accepted so we are currently working on that, and I ...

Read more »

Circle packing with R

July 26, 2010
By
Circle packing with R

To visualize the results of a simulation model of woodland trees within R, I needed an algorithm that could arrange a large number of circles within a rectangle such that no two circles overlapped by more than a specified amount. A colleague had approached this problem earlier by sorting the circles in order of descending size, then randomly dropping...

Read more »

Circle packing with R

July 26, 2010
By
Circle packing with R

To visualize the results of a simulation model of woodland trees within R, I needed an algorithm that could arrange a large number of circles within a rectangle such that no two circles overlapped by more than a specified amount. A colleague had approa...

Read more »

Asher’s enigma

July 25, 2010
By
Asher’s enigma

On his Probability and statistics blog, Matt Asher put a funny question (with my rephrasing): Take a unit square. Now pick two spots at random along the perimeter, uniformly. For each of these two locations, pick another random point from one of the three other sides of the square and draw the segment. What is

Read more »

R Chart

July 24, 2010
By
R Chart

Been meaning to write this for awhile...An R-Chart is a statistical quality assurance tool used to determine if a process is stable (and predictable).  It is intended to maintain and improve the quality of a process (a more formal definition is av...

Read more »

useR 2010 at NIST in Gaithersburg

July 24, 2010
By

This past week, the annual R user conference useR! 2010 took place at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD (which is a tad northwest of Washington, DC). Kate Mullen and her team of local organizers did a truly...

Read more »

useR 2010 at NIST in Gaithersburg

July 24, 2010
By

This past week, the annual R user conference useR! 2010 took place at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD (which is a tad northwest of Washington, DC). Kate Mullen and her team of local organizers did a truly t...

Read more »

useR 2010 at NIST in Gaithersburg

July 24, 2010
By

This past week, the annual R user conference useR! 2010 took place at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD (which is a tad northwest of Washington, DC). Kate Mullen and her team of local organizers did a truly...

Read more »

Local R User Group Panel from useR! 2010 (Video)

July 24, 2010
By

As I mentioned last week, I will be hosting videos of several of the keynote speakers from this year’s useR! 2010 conference at the video Rchive. As it happens, the first video I was able to upload was the panel discussion we held on starting local R user groups. I have uploaded the video,

Read more »

useR! 2010 – Local R User Group Panel

July 24, 2010
By

Panel discussion about forming local R user groups from useR! 2010. Panelists include, Jim Porzak (San Francisco Bay Area), David Smith (REvolution Analytics), John C. Nash (Ottawa, Canada), Drew Conway (New York City), Szilard Pafka (Los Angeles), M...

Read more »