Monthly Archives: January 2010

How to integrate R into web-based applications (video)

January 20, 2010
By

The slides and videos from Jeff Horner's talk at last week's Bay Area User Group session on R-Powered Web Apps are now available. I've embedded it here below, but you might want to click through to larger size for better readability on the slides. Jeff's talk (titled "Use Rapache! It works") gives an overview of how to integrate R...

Read more »

GWAS Manhattan plots and QQ plots using ggplot2 in R

January 20, 2010
By

Will posted earlier this week about how to produce manhattan plots of GWAS results using Stata, so I thought I'd share how I do this in R using ggplot2. First, if you've never used ggplot2, you'll need to add it to your R installation by typing: install.packages("ggplot2") Once you've done that, copy and paste this command to download the functions I wrote...

Read more »

Example 7.23: the Monty Hall problem

January 20, 2010
By
Example 7.23: the Monty Hall problem

The Monty Hall problem illustrates a simple setting where intuition often leads to a solution different from formal reasoning. The situation is based on the game show Let's Make a Deal. First, Monty puts a prize behind one of three doors. Then the player chooses a door. Next, (without moving the pize) Monty opens an...

Read more »

New UseR group in Seattle, WA

January 19, 2010
By

There's a new local R user group to add to the list. The latest addition is in Seattle, WA and the first meeting of the Seattle useR Group is tomorrow. The group is organized by Zack Stednick (a data analyst and R user at the Fred Hutchinson Cancer Research Center in Seattle), and this meeting is hosted by my...

Read more »

Introduce your friends to R

January 19, 2010
By

R has gotten quite a lot of exposure recently. It started with the feature article in the New York Times last January, but since then there's been a steady flow of articles about R in analyst reports, on blogs, in YouTube videos, on Twitter, as well as in the general news media. As a result, a lot of new...

Read more »

Solution manual for Introducing Monte Carlo Methods with R

January 19, 2010
By
Solution manual for Introducing Monte Carlo Methods with R

After the complete solution manual for Bayesian Core, the solution manual for the odd numbered exercises of “Introducing Monte Carlo Methods with R” is now arXived. The fuller 133 page version for instructors is available from Springer Verlag by demand only, in order to keep the appeal of the book as a textbook (even

Read more »

Use Rapache: It Works!

January 18, 2010
By

Presentations given at the Bay Area useR Group on January 10, 2010 by Jeff Horner, creator of the Rapache module, on "R-driven web applications".

Read more »

New features in ggplot2 version 0.85

January 18, 2010
By

Hadley Wickham recently updated the ggplot2 package for R to version 0.8.5. In addition to bugfixes and performance improvements, this version introduces some handy new features. Among them: the ability to display mathematical equations as text, automatic legends for color scales, and user-configurable axis labels and legend titles. The Learning R blog runs through the new features with worked...

Read more »

Coming to R from SQL, Python, SAS, Matlab, or Lisp

January 18, 2010
By

Head over to Revolutions Blog for a list of PDF and powerpoint resources for making the transition to R from other programming or stats languages.  All of these notes come from the New York R meetup. I enjoyed browsing the meetup's files - lots of powerpoints, PDFs, and example R data files for various topics, including several slideshows on...

Read more »

Updates to SoilWeb

January 17, 2010
By
Updates to SoilWeb

Soil Profiles in Color Added color support to the mini-profiles used in graphical map unit summaries, the Google Earth interface, and iPhone application. SSURGO doesn't contain soil color data, so colors (in Munsell notation) were extracted from the OSD database, and...

Read more »