## Cherry Picking to Generalize ~ retrospective meta-power analysis using Cohen’s f^2 of NASA temp + visualization

July 17, 2010
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$Cherry Picking to Generalize ~ retrospective meta-power analysis using Cohen’s f^2 of NASA temp + visualization$

Previously, I plotted a grid of NASA GISS global temps in ggplot2 to show general trends by the brute force method. Here, I will again use the brute force method to do a simple power analysis on a portion of the data (data here). The general aim is to figure out what the minimum sample

## Latent variable analysis package for R

July 17, 2010
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This is another R package for latent variable analysis. I hope it can soon include multilevel and mixture modeling capacity. Another promising package is OpenMx, which is also under active development and very promising. At this moment, OpenMx seems to...

## What (Search Engines Think) People Want

July 17, 2010
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R O How G8 U R!Hey, R U there? Having used the R language for awhile now, I would like to let you know that R works - in fact R works really well. If you keep up with R news this should be no surprise...this is, after all...an r blog! R and R alone c...

## CoRe in CiRM [end]

July 17, 2010
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Back home after those two weeks in CiRM for our “research in pair” invitation to work on the new edition of Bayesian Core, I am very grateful for the support we received from CiRM and through it from SMF and CNRS. Being “locked” away in such a remote place brought a considerable increase in concentration

## Distorting the Electoral Connection? Partisan Representation in Confirmation Politics

July 17, 2010
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John Kastellec, Jeff Lax, and Justin Phillips write: Do senators respond to the preferences of their states' median voters or only to the preferences of their co-partisans? We study responsiveness using roll call votes on te...

## More StackExchange sites

July 16, 2010
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The StackExchange site on Statistical Analysis is about to go into private beta testing. This is your last chance to commit if you want to be part of the private beta testing. Don’t worry if you miss out — it will only be a week before it is then open to the public. There is

## Documenting R‘s Connections Internals

July 16, 2010
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In studying R‘s connections source code, I’ve put together a series of notes about their workings. Rather than let the notes go where most of my notes go (I have no idea ), I decided to do some proofreading and make the notes available to others who might be interested. These notes should make the

## Starting an EC2 Machine Then Setting Up a Socks Proxy… From R!

July 16, 2010
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I do some work from home, some work from an office in Chicago and some work on the road. It’s not uncommon for me to want to tunnel all my web traffic through a VPN tunnel. In one of my previous blog posts I alluded to using Amazon EC2 as a way to get around

## In case you missed it: June Roundup

July 16, 2010
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Wow, is it the middle of July already? Anyway, in case you missed them, here are some articles from June of particular interest to R users. We noted that the program for the annual R user conference, useR! 2010, has been announced. (I and the rest of the Revolution team are looking forward to seeing all the R folks...

## Because it’s Friday: Analytics of an Engagement

July 16, 2010
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The always-interesting R blogger and political scientist Drew Conway -- and self-styled luckiest man on earth -- just announced some very happy news: he just got engaged to his future wife! Congratulations, Drew! (Drew proposed the traditional way, on a lovely European vacation. But if he'd just held off a couple of days he could have proposed via towel-clad...

## Generating Balanced Incomplete Block Designs (BIBD)

July 16, 2010
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The Balanced Incomplete Block Design (BIBD) is a well studied experimental design that has various desirable features from a statistical perspective. The crossdes package in R provides a way to generate a block design for some given parameters and test wheter this design satisfies the BIBD conditions. For a BIBD there are v treatments repeated r

## Want to join the closed BETA of a new Statistical Analysis Q&A site – NOW is the time!

July 16, 2010
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The bottom line of this post is for you to go to: Stack Exchange Q&A site proposal: Statistical Analysis And commit yourself to using the website for asking and answering questions. (And also consider giving the contender, MetaOptimize a visit) * * * * Statistical analysis Q&A website is about to go into BETA A month ago I invited...

## Rcpp 0.8.4

July 15, 2010
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Romain and I wrapped up release 0.8.4 of Rcpp last Friday. However, given the time of year, it only appeared on CRAN this morning, and then only after some prodding as CRAN processing is more or less closed this week and probably next. This release bu...

## Rcpp 0.8.4

July 15, 2010
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Romain and I wrapped up release 0.8.4 of Rcpp last Friday. However, given the time of year, it only appeared on CRAN this morning, and then only after some prodding as CRAN processing is more or less closed this week and probably next. This release...

## CoRe in CiRM [6]

July 15, 2010
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This is the last day at CiRM for our “research in pair” working on the new edition of Bayesian Core. I mostly completed the revision of the chapter on Bayesian imaging, including stuff on Markov random fields and mainly on ABC algorithms. All that remains to be done about this chapter is the processing of

## Anatomy of a Life-Milestone Announcement on Facebook

July 15, 2010
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As I have mentioned, I recently returned for a lovely trip to Europe. While on vacation my brilliant, beautiful, funny, and all around perfect girlfriend accepted my invitation to be my wife. Pause for shared overwhelming feeling of joy… While I am still basking in the glow of being the luckiest man on Earth, as

## Wanted: Big-data beta testers

July 15, 2010
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We're nearing completion of the package of statistical tools for very large data sets that I gave an early preview of at R/Finance 2010. It will be released for Revolution R Enterprise later this year, but we're looking for some R users with big data sets to put the 1.0 version through its paces in the beta program and...

## R: a “Rock Star” for Business Intelligence

July 15, 2010
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TDWI (The Data Warehousing Institute) recently published a comprehensive article about R and increasing level of activity around it from commercial organizations, including Revolution Analytics. The article opens with: In statistical circles, "R" is the name of an open source programming language for statistical analysis. These days, it might also be shorthand for "rock star." Many of the companies...

## ggplot2 GSOC progress

July 15, 2010
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(Written by Ian Fellows) The RForge build error has been fixed. the package can now be tried with: install.packages("Deducer",,"http://www.rforge.net",type="source")

## ggplot2 GSOC progress

July 15, 2010
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(Written by Ian Fellows) The next installment of the vlog is here. All of ggplot2 has been implemented, including layers, scales, facets, and themes. For some reason rforge.net is having some troubles with my package, so you would need to build it from...

## Maps, Geocoding, and the R User Conference 2010

July 14, 2010
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The R User Conference 2010 is scheduled for July 20-23, 2010.  Wanna know where?Although there are more sophisticated methods of mapping with R the maps package makes mapping activities straightforward.  A bit of XML and Google...

## Creating a Presentation with LaTeX Beamer – Tables

July 14, 2010
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Tables of information can be included in a LaTeX beamer presentation in the same way that they would be incorporated into any other LaTeX document. The tabular environment is used and, if necessary, the tables could be numbered but this probably doesn’t make as much sense as labelling and numbering tables within an article or

## R’s Normal Distribution Functions: rnorm and pals

July 14, 2010
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The rnorm() function in R is a convenient way to simulate values from the normal distribution, characterized by a given mean and standard deviation. I hadn't previously used the associated commands dnorm() (normal density function), pnorm() (cumulative...

## Revolution at useR! 2010

July 14, 2010
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Revolution Analytics is a proud sponsor of this year's annual R user conference, useR! 2010, and many members of the Revolution team will be there at Gaithersburg next week. We'll be hosting a booth at the conference where you can come up and meet the team, and see some of the new features being developed for Revolution R in...

## Homicide in North America

July 14, 2010
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I'm surprised by how similar the trends are (excluding the drug war in Mexico). There were big decreases in the homicide rate in all three countries starting in the early nineties, which then slowed down around 2000. The homicide rates for Mexicans ...

## Homicide in North America

July 14, 2010
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I'm surprised by how similar the trends are (excluding the drug war in Mexico). There were big decreases in the homicide rate in all three countries starting in the early nineties, which then slowed down around 2000. The homicide rates for Mexicans ...

## Short Open Source Q&A with Revolution Analytics

July 14, 2010
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I recently e-mailed David Smith of Revolution Analytics with a few questions about their relationship with the R-project, and how they handle R‘s source code. David mentioned, and I’m flattered that my email motivated an additional page on the Revolution website. Beyond this, I have no other relationship with the company. I’d like to thank

## QQ plot of p-values in R using base graphics

July 14, 2010
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Update Tuesday, September 14, 2010: Fixed the ylim issue, now it sets the y axis limit based on the smallest observed p-value. A while back Will showed you how to create QQ plots of p-values in Stata and in R using the now-deprecated sma package. A bi...

## Multidimension bridge sampling (CoRe in CiRM [5])

July 13, 2010
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Since Bayes factor approximation is one of my areas of interest, I was intrigued by Xiao-Li Meng’s comments during my poster in Benidorm that I was using the “wrong” bridge sampling estimator when trying to bridge two models of different dimensions, based on the completion (for and missing from the first model) When revising the