# Monthly Archives: December 2010

## Some problems with the Mexican mortality database

December 22, 2010
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I've written before about how I couldn't find the Acteal Massacre in the homicide database available at the INEGI. So I decided to check if the deaths that occurred as a consequence of the massacre were misclassified as other types of violent death, and indeed they were. In the municipality of Chenalhó,...

## A plea for consistent style!

December 22, 2010
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As we get close to the end of the year, it's time to look back over the past year and think of resolutions for 2011 and beyond. One that's often on my mind relates to ways to structure my code to make it clearer to others (as well as to myself when I l...

## Forbes: R is a name you need to know in 2011

December 22, 2010
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The December 20 issue of Forbes magazine, on newsstands now, includes a column about R on page 128 as part of the "Name You Need to Know in 2011" feature. It's basically an excerpt from this blog post by Steve McNally and its comments, and includes quotes from Norman Nie of Revolution Analytics, Bill Alpert of Barron's, and Brandon...

## A Special Graphics Device in R: the Null Device

December 22, 2010
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It is well-known that R has several graphics devices — either the screen devices (X11(), windows(), …) or the off-screen devices (pdf(), png(), …). We can query the default graphics device in options(): getOption('device') In a non-interactive session, the default device is pdf(). This is why Sweave has to create a file named Rplots.pdf no

## Oil – Natural Gas Cointegration – turning point?

December 22, 2010
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## Data-driven arterial input functions

December 22, 2010
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I haven't devoted any time/effort/code to the extraction and parameter estimation of arterial input functions (AIFs) for DCE-MRI in either the vignette or the submission to JSS.  Frankly, I wanted to communicate the main features of the R package dcemriS4 and data-driven AIFs just haven't made the list... up 'til now.  So let's assume one wants to fit...

## Stacked histogram with ggplot2

December 22, 2010
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With ggplot2 there is a possibility to create divide bars of a histogram into different categories:

## RcppExamples 0.1.2

December 22, 2010
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A new version of our RcppExamples, package is now on CRAN. RcppExamples contains a few illustrations of how to use Rcpp. It grew out of documentation for the classic API (now in its own package RcppClassic) and we added more functions documenting...

## CrossValidated Journal Club

December 21, 2010
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Journal Clubs are a great way to learn new research ideas and to keep up with the literature. The idea is that a group of people get together every week or so to discuss a paper of joint interest. This can happen within your own research group or department, or virtually online. There is now

## Questions on the parallel Rao-Blackwellisation

December 21, 2010
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$Questions on the parallel Rao-Blackwellisation$

Pierre Jacob and I got this email from a student about our parallel Rao-Blackwellisation paper. Here are some parts of the questions and our answer: Although I understand how the strategy proposed in the paper helps in variance reduction, I do not understand why you set b=1 (mentioned in Section 3.2) and why it plays