RUG Introduction: Los Angeles area R Users Group

July 28, 2010
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RUG Introduction: Los Angeles area R Users Group

A nice group of people from academia and industry meeting about once a month at UCLA. Attendance is usually 30-40, but gradually increasing (also about 300 registered members). If you’d like to join, visit the group’s website: http://www.meetup.com/LAarea-R-usergroup/, you’ll find … Continue reading →

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IPSUR book used LyX-Sweave

July 28, 2010
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Jay Kerns wrote a book titled "Introduction to Probability and Statistics Using R" or IPSUR for short. He has put up a web site for the book and Rcmdr plugin. There are at least two very important points from my side (I did not read the book, yet): 1. ...

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IPSUR book used LyX-Sweave

July 28, 2010
By

Jay Kerns wrote a book titled "Introduction to Probability and Statistics Using R" or IPSUR for short. He has put up a web site for the book and Rcmdr plugin. There are at least two very important points from my side (I did not read the book, yet): 1. ...

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Taking R to Eleven

July 28, 2010
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R, the open-source statistical software system, is certainly a hot topic these days. It's been the subject of increasing media interest over the last year or so, and the user community is expanding rapidly: there are now about 40 R user groups around the world, and last week's worldwide R User Conference was the most successful ever. So why...

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Extension to an R Package: brew gets a weave

July 28, 2010
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I’ve had enough of copy and pasting output from my R session into my email editor, blog, etc. I need something like Sweave for plain text files. In particular, I want the result of parsing <<echo=TRUE>>= f <- function(x) { x + 1 } f(1) @ with Sweave, but without the latex markup. For example,

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Social contagion? Maybe not…

July 28, 2010
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Social contagion? Maybe not…

Recently there was a lot of racket about results presented in papers by a pair Nicholas Christakis & James Fowler. Their papers gained a lot of attention both in the academic world as well as in media. In their papers they claim to provide evidence for social contagion (transmission through social networks) of several types

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Seamless R and C++ integration

July 28, 2010
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Seamless R and C++ integration

Video of the talk “Seamless R and C++ integration” by Dirk Eddelbuettel at the Los Angeles area R Users Group in March 2010 (to see the video in a larger size, click inside the video but outside the play button):

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Web applications with R

July 28, 2010
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Web applications with R

Video of the talk “Web applications with R” by Jeroen Ooms at the Los Angeles area R Users Group in January 2010:

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Juggling with fire

July 27, 2010
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People were juggling with fire sur la place de la Comedie tonight in Montpellier

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Revolution in the News

July 27, 2010
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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...

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A summer of books

July 27, 2010
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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,

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Hadley Wickham’s ggplot2 / Data Visualization Course Materials

July 27, 2010
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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...

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Mystery solved: The discrepancy in homicide data

July 27, 2010
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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...

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Mystery solved: The discrepancy in homicide data

July 27, 2010
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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...

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useR! 2010

July 27, 2010
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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 ...

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rgeos – Update

July 27, 2010
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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

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Statistical Analysis StackExchange site now available

July 26, 2010
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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

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Hacker News User Base Changed?

July 26, 2010
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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...

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Rcpp 0.8.5

July 26, 2010
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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...

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Rcpp 0.8.5

July 26, 2010
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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...

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A tty Connection for R

July 26, 2010
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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.

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Snapshots from useR! 2010

July 26, 2010
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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....

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Extracting Raster Values from Points in R and GRASS

July 26, 2010
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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,...

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Extracting Raster Values from Points in R and GRASS

July 26, 2010
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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,...

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

July 26, 2010
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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...

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Using SAS for Data Management, Statistical Analysis, and Graphics

July 26, 2010
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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...

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New R User Group in Melbourne

July 26, 2010
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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...

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R Plotting tips

July 26, 2010
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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 ...

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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 »