Monthly Archives: April 2011

Statisfaction on R-bloggers

April 23, 2011
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Statisfaction on R-bloggers

This is the first post of Statisfaction on R-bloggers. As an introduction: we are PhD students and postdocs at CREST, a research centre on economics and statistics located in Paris, France. We jointly share tips and tricks useful in our everyday jobs, links to various pages, articles, conferences, seminars, including a PhD student seminar at

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Michael Ryder Streaks

April 22, 2011
By
Michael Ryder Streaks

A ways back I put up a post that uses R to plot the scoring trends of an NHL player. Given the recent chatter on sports talk radio around Boston, I used my script to plot the data for Michael … Continue reading →

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Intro

April 22, 2011
By
Intro

This blog will show you how to build tools to survive in the modern world. I will focus on statistics and machine learning, because that's where my strengths lie, but sometime we may find ourselves veering far off course.My primary interest lies in us...

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Zoo Slows Down Your Linear Model Function

April 22, 2011
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I was a bit frustrated when I read Aris's comment to this post about speed of his calculations in Matlab. So I changed the time span of my dataset to 5 years and repeated the whole code. It was VERY disappointing to get the results after more than 5 ho...

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How to load your iPhone location data into R

April 22, 2011
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How to load your iPhone location data into R

Earlier this week, data scientists Pete Warden and Alasdair Allen reported that iPhones and cell-enabled iPads keep an internal log of the devices location, which is accessible from the backup that iTunes creates when you sync the device. (Update Apr 27: Apple responds that the locations are those of nearby cell towers and wi-fi hotspots, not the device itself.)...

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Visualizing iPhone location tracking with R and Google Maps

April 22, 2011
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Visualizing iPhone location tracking with R and Google Maps

Visualize location logs created by the iPhone using R and Google Maps.

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Big data problems

April 22, 2011
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Big data problems

I have big data problems.I need to analyze 100s of millions of rows of data and tried hard for 2 weeks to see if I can use R for this. My assessment so far from the experiments...1) R is best for data that fits a computer's RAM (so get more RAM if...

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Statistical analyses using R

April 22, 2011
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Statistical analyses using R

Another book I received from the Short Book Reviews section of the International Statistical Review is Everitt’s and Hothorn’s Handbook of statistical analyses using R. Here is a version of my book review. This book is the second (blue) edition of a successful (violet) handbook that can benefit a wide audience interested in using

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Sexy, Geeky Graphs using ggplot2 in R

April 22, 2011
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Sexy, Geeky Graphs using ggplot2 in R

So I’ve been looking for some data to play with while learning R, other than the data I’m analysing for various experiments and papers I’m working on. I thought to myself, “Hey, this R stuff is pretty geeky. Can I engage in a higher level of geekiness?” And I think I’ve found a way: using

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How to Build a Dataset in R using an RSS feed or Web page

April 22, 2011
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How to Build a Dataset in R using an RSS feed or Web page

I recently wanted to build a dataset from content in an RSS feed - the feed of crimes in Newark provided by SpotCrime.  (They have feeds for lots of US cities, but I just wanted Newark.  Please read their Terms of Service before using this co...

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