Monthly Archives: March 2011

R-ecap [-16]

March 26, 2011
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R-ecap [-16]

This morning, I noticed that none of my R related posts had appeared on R-bloggers for the past fortnight… After investigating, this was caused by…cut-and-paste! Indeed, when advertising about the special issue of TOMACS Arnaud Doucet and I edit about Monte Carlo methods in Statistics, I copied the main parts from the pdf announcement, straight

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clusterProfiler in Bioconductor 2.8

March 26, 2011
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In recently years, high-throughput experimental techniques such as microarray and mass spectrometry can identify many lists of genes and gene products. The most widely used strategy for high-throughput data analysis is to identify different gene clusters based on their expression profiles. Another commonly used approach is to annotate these genes to biological knowledge, such as Gene Ontology (GO) and...

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“An R package” or “A R package”

March 26, 2011
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“An R package” or “A R package”

I’m currently writing some lecture notes on R and I used the phrase “a R package” without thinking. Since the word following the article “a” was a consonant, I automatically went for “a” instead of “an”. The problem is that “R” sounds likes a vowel, so “a R package” grates on the listener. The correct

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solaR 0.22 is at CRAN

solaR 0.22 is at CRAN

The version 0.22 of solaR is now available at CRAN. Besides, solaR is now registered at R-Forge. A new mergesolaR method has been defined for merging solaR objects. The calculation of the sunset time has been improved. The voltage dependency of the efficiency curve of the inverter is now included in fProd and calcGCPV. The

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How to backtest a strategy in R

March 26, 2011
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This is the third post in the Backtesting in Excel and R series and it will show how to backtest a simple strategy in R.  It will follow the 4 steps Damian outlined in his post on how to backtest a simple strategy in Excel.Step 1: Get the dataThe ...

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Le Monde puzzle [#7]

March 26, 2011
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Le Monde puzzle [#7]

The mathematical puzzle from the weekend edition of Le Monde from a few weeks ago was not too hard to solve by induction but my R code failed miserably! The puzzle was as follows: A calculator is broken in such a way that it starts by exhibiting 0, then pressing 4, 6 or 0 keeps

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A Request for Foursquare Data

March 25, 2011
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I’m trying to collect data sets that showcase how the classical statistical distributions appear in modern contexts. I’ve already got some data that shows how the gamma distribution appears in video game scores, and now I’m hoping to find an example where the exponential distribution

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Aquamacs 2.2 and ESS

March 25, 2011
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News of the latest release of Aquamacs, version 2.2, appeared this week in my echo area. Given the opportunity to procrastinate, I dropped everything and upgraded; returning to work, I noticed that the version of ESS shipped with Aquamacs 2.2 is ESS 5...

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R inside Qt: A simple RInside application

March 25, 2011
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R inside Qt: A simple RInside application

The RInside package makes it pretty simple and straightforward to embed R, the wonderful statistical programming environment and language, inside of a C++ application. This uses both the robust embedding API provided by R itself, and the higher-level...

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Because it’s Friday: Do Celebrities Follow the Half Your Age Plus Seven Rule?

March 25, 2011
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celeb small

Remember the Dating Equation from a while back, that formula that determines the socially acceptable bounds for the age of a female companion given the age of the male partner? Well, the crack data analysis team at Revolution Analytics decided to take the 100 hottest celebrity couples of 2010, and create a scatterplot of the couple's ages (using R),...

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