Monthly Archives: January 2012

John Snow’s famous cholera analysis data in modern GIS formats

January 6, 2012
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John Snow’s famous cholera analysis data in modern GIS formats

In 1854 there was a massive cholera outbreak in Soho, London – in three days over 120 people died from the disease. Famously, John Snow plotted the locations of the deaths on a map and found they clustered around a pump in Broad Street – he suggested that the pump be taken out of service

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Trading using Garch Volatility Forecast

January 5, 2012
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Trading using Garch Volatility Forecast

Quantum Financier wrote an interesting article Regime Switching System Using Volatility Forecast. The article presents an elegant algorithm to switch between mean-reversion and trend-following strategies based on the market volatility. Two model are examined: one using the historical volatility and another using the Garch(1,1) Volatility Forecast. The mean-reversion strategy is modeled with RSI(2): Long when

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Scraping R-bloggers with Python – Part 2

January 5, 2012
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In my previous post I showed how to write a small simple python script to download the pages of R-bloggers.com. If you followed that post and ran the script, you should have a folder on your hard drive with 2409 .html files labeled post1.html , post2....

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Coat of arms of Poland challenge

January 5, 2012
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Coat of arms of Poland challenge

Last week I have experimented with coloring map of Poland in national colors. Vaidotas Zemlys improved on my effort by adding colors to map of Lithuania and posted a challenge to also add coat of arms to the plot. This proved to be a nice exe...

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getting ICES 1903-1949 catch statistics into R

January 5, 2012
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getting ICES 1903-1949 catch statistics into R

in the last post i showed how to get the nominal north east atlantic landings data from 1950 onwards into a usable format in R. this time around a script that shows how to import zipped excel files from 1903 to 1949 is provided. finalizing with a ggplo...

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Example 9.18: Constructing the fastest relay team via enumeration

January 5, 2012
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Example 9.18: Constructing the fastest relay team via enumeration

In competitive swimming, the medley relay is a team event in which four different swimmers each swim one of the four strokes: freestyle, breaststroke, backstroke, and butterfly. In general, every swimmer might be able swim any given stroke. How can w...

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Revisiting basic macroeconomics : Illustrations with R

January 5, 2012
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Revisiting basic macroeconomics : Illustrations with R

PrologueAfter 3 semesters of studying economics at IGIDR, the basics of macroeconomics still elude me. What policy shifts what curve? What determines the slope of IS-LM and AD-AS curves? What exactly was Keynes contribution to Economics? How do all the...

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Survey: Writing package vignette

January 5, 2012
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Survey: Writing package vignette

I am currently co-writing the vignette for the ChainLadder package and wonder what I should be focusing on. I have co-written the vignette of the googleVis package in the past and based it purely and what I thought would work. So, this is an experiment...

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Good at applying R? Be a Sales Engineer!

January 5, 2012
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Revolution Analytics is hiring! We're looking for a Sales Engineer -- someone who can show Revolution R to potential customers and really show off what R can do in an applied setting. (Fun fact: this was my first job when I left university, and it's a lot of fun.) The job description is below, please pass it along to...

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