Monthly Archives: February 2012

Implementing Circles example

February 4, 2012
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Implementing Circles example

This week I reimplemented part of Conic Sections 1 model from NetLogo. In the model turtles seek to to be in target distance from center.My code takes only one center point, so only circles can be obtained. Apart from turtle location plot giv...

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Berlin’s children

February 4, 2012
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Berlin’s children

Few years ago, a newspaper claimed the block I live in — Prenzlauer Berg in Berlin — is the most fertile region in Europe. It was a hoax, as this (German) newspaper article points out. (The article has become quite famous because it coined the term Bionade Biedermeier to describe the life style in this area.)However,...

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Coming R meetings in Paris

February 4, 2012
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Coming R meetings in Paris

If you live in Paris and are interested in R, there will be two meetings for you this week. First a Semin-R session, organized at the Muséum National d’Histoire Naturelle on Tuesday 7 Feb (too bad, the Museum is closed on Tuesdays). Presentations will be about colors, phylogenies and maps, while I will speak about

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"R": PLS Regression (Gasoline) – 003

February 3, 2012
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"R": PLS Regression  (Gasoline) – 003

The gasoline data set has the spectra of 60 samples acquired by diffuse reflectance from 900 to 1700 nm. We saw how to plot the spectra in the previous post.Now, following the tutorial of Bjorn-Helge Mevik published in "R-News Volume 6/3, August 2006", we will do the PLS regression:gas1 <- plsr(octane~NIR, ncomp = 10,data = gasoline, validation...

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Accelerating analytics at MSU with Revolution R Enterprise

February 3, 2012
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Erik Sigur, Information Technologist for the Department of Statistics and Probability at Michigan State University, writes at ReadWriteWeb about using Revolution R Enterprise to provide high-performance computation in R to the researchers in his department: Our search for a more effective version of R ultimately brought us to a product called Revolution R Enterprise by Revolution Analytics, which provides...

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Monty Hall by simulation in R

February 3, 2012
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Monty Hall by simulation in R

(Almost) every introductory course in probability introduces conditional probability using the famous Monte Hall problem. In a nutshell, the problem is one of deciding on a best strategy in a simple game. In the game, the contestant is asked to select one of three doors. Behind one of the doors is a great prize (free

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Forbes: Top 20 influencers in Big Data

February 3, 2012
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Haydn Shaughnessy at The Forbes blog provides a list of the "Top 20 Influencers in Big Data", and I'm humbled to report that yours truly is listed there at #2. It's an instantaneous ranking based on the social-media tracking tool Traakr, but it's still great to be listed alongside writers for SiliconAngle, GigaOM, and KDNuggets (and even Mashable!). I...

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New R User Groups in Austin, Adelaide

February 3, 2012
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It's awesome to see so many local R user groups kicking off in 2011! Yet another is the Austin R User Group in Austin, Texas. They've already held their first informal get-together, and the first formal meeting on February 23 will be devoted to data management techniques in R. Props to Sandy Donlon for organizing the group! And I'm...

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Why don’t we hear more about Adrian Dantley on ESPN? This graph makes me think he was as good an offensive player as Michael Jordan.

February 3, 2012
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Why don’t we hear more about Adrian Dantley on ESPN? This graph makes me think he was as good an offensive player as Michael Jordan.

In my last post I complained about efficiency not being discussed enough by NBA announcers and commentators. I pointed out that some of the best scorers have relatively low FG% or TS%. However, via the comments it was pointed out that top scorers need ...

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Large search spaces using R

February 3, 2012
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I'm working on some really interesting stuff at the moment, the details of which I can't discuss for reasons of national security (not really). However, one of the things I've been doing a lot of is searching though lots of different combina...

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