May 2012

Permutation tests in R

May 21, 2012 | Rob Kabacoff

Permuation tests (also called randomization or re-randomization tests) have been around for a long time, but it took the advent of high-speed computers to make them practically available. They can be particularly useful when your data are sampled from unkown … Continue reading →
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RcppArmadillo 0.3.2.0

May 21, 2012 | Thinking inside the box

A new stable release 3.2.0 of Armadillo is now available. As usual, we have wrapped this into a new RcppArmadillo package, now at 0.3.0.2; and this version is now available via CRAN. The short NEWS entry follows below. For those interested in follo... [Read more...]

Project Euler — problem 2

May 21, 2012 | Tony

Almost my time for bed. Just write a quick solution on the second problem of Project Euler. Here it is. Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, … Continue reading → [Read more...]

The Simple Gibbs example in Julia

May 21, 2012 | Douglas Bates

The Gibbs sampler discussed on Darren Wilkinson's blog and also on Dirk Eddelbuettel's blog has been implemented in several languages, the first of which was R. In preparation for a session at useR!2012 on "What other languages should R user... [Read more...]

Example 9.32: Multiple testing simulation

May 21, 2012 | Ken Kleinman

In examples 9.30 and 9.31 we explored corrections for multiple testing and then extracting p-values adjusted by the Benjamini and Hochberg (or FDR) procedure. In this post we'll develop a simulation to explore the impact of "strong" and "weak" control of the family-wise error rate offered in multiple comparison corrections. Loosely put, ...
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R-NOLD 2012-05-21 04:46:00

May 21, 2012 | arsalvacion

Mapping Philippines earthquake data from January 2011 to January 2012 collected by PHIVOLCS using R ggplot package.I tried to recreate the earthquake map of the Philippines created using maptool and R plot function using ggplot2. Earthquake map ...
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Time-Series Policy Evaluation in R

May 21, 2012 | diffuseprior

Quantifying the success of government policies is clearly important. Randomized control trials, like those conducted by drug companies, are often described as the ‘gold-standard’ for policy evaluation. Under these, a policy is implemented in/to one area/group (treatment), but not in/to another (control). The difference in outcomes between ... [Read more...]

CambR and other upcoming events

May 21, 2012 | Pat

New events CambR (Cambridge UK R user group) 2012 May 29 6:30 PM for 7:00 PM start. Pat Burns “Inferno-ish R” Abstract: While R is wonderful, it is not uniformly wonderful. We highlight a few things generally found to be confusing, and outline the forces that have driven such imperfections. Markus Gesmann “Interactive charts ...
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Alternate way of plotting means and errors

May 20, 2012 | Samuel Brown

Last month, I wrote a post discussing dynamite plots, noting that they're not considered to be especially good at presenting information. I got a little bit of flak for it, from people for and against dynamite plots. This post shows a different method of showing a point and an error ... [Read more...]

Bayes on drugs (guest post)

May 20, 2012 | xi'an

This post is written by Julien Cornebise. Last week in Aachen was the 3rd Edition of the Bayes(Pharma) workshop. Its specificity: half-and-half industry/academic participants and speakers, all in Pharmaceutical statistics, with a great care to welcome newcomers to Bayes, so as to spread as much as possible the ... [Read more...]

Cleveland Indians’ Attendance

May 20, 2012 | Andrew Landgraf

Recently, Chris Perez, the closer for the Indians, displayed some frustration with the fans for not supporting the team. Currently, they have the lowest attendance in the majors -- by a decent margin. The Indians are averaging about 15,000 fans per hom... [Read more...]
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