Monthly Archives: June 2009

Parallel computing in R: snowfall/snow

June 20, 2009
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I finally have time to try parallel computing in R using snowfall/snow thanks to this article in the 1st issue of R journal, which replaces R news. I didn’t try it before because i didn’t have a good toy example, and it seemed like a steep learning curve (i only guessed what parallel computing was).

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Network Analysis Software: focus on F/OSS

June 20, 2009
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Network Analysis Software: focus on F/OSS

What do you use for network analysis? I found the Wikipedia list of network software entirely overwhelming. I wanted to test out some of the introductory tools, but avoid the trap of sinking my time into a dead-end software project. (Remember learning Minitab in freshman statistics? How often do you use Minitab today for anything

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Analysis of Iran absentee votes

June 20, 2009
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Analysis of Iran absentee votes

On http://www.presstv.com/detail.aspx?id=98206&sectionid=351020101 the official Iranian election results outside of Iran are posted. Here is a bit of exploration of the results.The graph shows the number of votes for Ahmadinejad (x-axis) vs. the nu...

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R: Function to create tables in LaTex or Lyx to display regression model results

June 19, 2009
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R: Function to create tables in LaTex or Lyx to display regression model results

Most people using LaTex feel that creating tables is no fun. Some days ago I stumbled across a neat function written by Paul Johnson that produces LaTex code as well as LaTex code that can be used within Lyx. The output can be used for regression models and looks like output from the Stata outreg

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Iran Election analyzed with R

June 19, 2009
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Iran Election analyzed with R

Here you can find a very interesting post depicting the R strengths in 'real-time statistics'. I'd like to use the occasion to thank David Smith for hosting the best, imho, blog on R!  Follow Him on Twitter: @revodavid .

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bugsparallel

June 18, 2009
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bugsparallel is a Metrum Institute project to run BUGS (via R2WinBUGS) in parallel - McMC is an application, where parallel runs can be used very efficientlly. Here is the code for one example using bugsparallel.Some usefull links:Rosenthal, Parallel c...

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open-source campaign finance analysis with R and MySQL

June 18, 2009
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open-source campaign finance analysis with R and MySQL

Introduction In Part 1 of this tutorial we introduced the fechell library by extracting all itemized contributions from individuals made to the Obama For America campaign in 2007 and 2008. In Part 2 of the tutorial we will summarize that data set by importing it into a MySQL database and aggregating contributions by week and

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The Second Coming

June 18, 2009
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Pew Research has found that 79% of Americans believe in The Second Coming of Jesus. What worries me more is not that 4 out of 5 Americans believe in The Second Coming, but that 1 out of 5 believes it will happen in their lifetime. It seems inevitable t...

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Influence.ME: don’t specify the intercept

June 18, 2009
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Just recently, I was contacted by a researcher who wanted to use influence.ME to obtain model estimates from which iteratively some data was deleted. In his case, observations were nested within an area, but there were very unequal numbers of ...

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Not Just Normal… Gaussian

June 16, 2009
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Not Just Normal… Gaussian

Dave, over at The Revolutions Blog, posted about the big ‘ol list of graphs created with R that are over at Wikimedia Commons. As I was scrolling through the list I recognized the standard normal distribution from the Wikipedia article on the same topic. Below is the fairly simple source code with lots of comments. Here’s

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