Monthly Archives: July 2010

bibtex 0.2-1

July 10, 2010
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I've uploaded version 0.2-1 of my bibtex package to CRAN.This release anticipates changes in R 2.12.0, and structures bibtex entries in object of the new class bibentry. The release also fixes various parser and lexer bugs

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Creating a Presentation with LaTeX Beamer – Bullet Lists

July 10, 2010
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Creating a Presentation with LaTeX Beamer – Bullet Lists

When writing a presentation we might want to use a bullet list to highlight some key points that might be lost if they are part of a large body of text. We can use the standard LaTeX environments for creating lists within a beamer presentation in a straightforward way. Fast Tube by Casper The bullet lists can

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Visualizing the census

July 9, 2010
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Visualizing the census

Now that the 2010 survey is over, you might be wondering what we can learn from the data when the aggregated results are published. For a good guide to the kinds of questions you'll be able to answer, take a look at StatJump, where you can see tables and charts of the results of the 2000 census: population data...

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R and Oracle HR Part II – Plotting a single variable

July 9, 2010
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R and Oracle HR Part II – Plotting a single variable

If you have not done so already, make sure you have R and Oracle setup as described in the previous article.  If so, you should be able to create a connection from R and list the tables that are available in the HR schema.library('RODBC')ch <-o...

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Les estivales 2010

July 9, 2010
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Les estivales 2010 ont commencées à montpellier.

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Chatfield’s Plots in S-Plus

July 9, 2010
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Chatfield’s Plots in S-Plus

I have recently finished reading the sixth edition of The Analysis of Time Series: An Introduction by Chatfield in our Statistics reading group. Whilst enjoying most of the book I got a little confused when looking at Appendix D: Some … Continue reading →

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Funny Math in Governor Approval Ratings

July 9, 2010
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Andrew Gelman wrote today about some erroneous U.S. Governor approval ratings, noting that the ratings for Janet Napolitano sum to 108%. In fact most of these ratings do not sum to 100%. I prepared a clean CSV file of the ratings, making use of R‘s XML library and the readHTMLTable function. The ratings data file

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World Bank data plots

July 9, 2010
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World Bank data plots

Couple of weeks ago, I was looking for interesting data sets to play with using R. I came across this post and got inspired to use World Bank data to extract interesting patterns/facts about developing countries. World Bank has 300+ World Development i...

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100 Prisoners, 100 lines of code

July 9, 2010
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100 Prisoners, 100 lines of code

In math and economics, there is a long, proud history of placing imaginary prisoners into nasty, complicated scenarios. We have, of course, the classic Prisoner’s Dilemma, as well as 100 prisoners and a light bulb. Add to that list the focus of this post, 100 prisoners and 100 boxes. In this game, the warden places

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TripleR/ BlockR: Working on mixed effect models …

July 9, 2010
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TripleR/ BlockR: Working on mixed effect models …

At the moment I’m working on the implementation of full block designs (e.g., every member of group A rates each member from group and vice versa. A typical example is speed dating: every man rates each woman and vice versa). These designs can be analyzed with mixed effect models, and now I’m a bit confused

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