2772 search results for "gis"

London Olympics and a prediction for the 100m final

July 22, 2012
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London Olympics and a prediction for the 100m final

It is less than a week before the 2012 Olympic games will start in London. No surprise therefore that the papers are all over it, including a lot of data and statistis around the games. The Economist investigated the potential financial impact on spons...

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Modeling Permanent and Gradual Process Changes with CDFs

July 20, 2012
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Modeling Permanent and Gradual Process Changes with CDFs

Spencer HerathSpecial thanks to Ben OgorekBackgroundI recently faced a process with a structural change resulting in an increase in the process mean.  The jump to the new mean was not immediate; rather, there was a gradual increase in values over time.  I had previously benefited from multi-staged process-behavior charts when encountering immediate process shifts, but now I needed a...

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Best of Axys, R, d3.js, and HTML5

July 19, 2012
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Best of Axys, R, d3.js, and HTML5

Axys, R, d3.js, and HTML5 all offer incredibly powerful tools for investment management and reporting, but they are not set up to synergistically interact to fill each other’s gaps and leverage each other’s strengths.  In my ideal scenario, Ax...

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Plotting the Frequency of Twitter Hashtag Usage Over Time with R and ggplot2

July 17, 2012
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Plotting the Frequency of Twitter Hashtag Usage Over Time with R and ggplot2

The 20th annual ISMB meeting was held over the last week in Long Beach, CA. It was an incredible meeting with lots of interesting and relevant talks, and lots of folks were tweeting the conference, usually with at least a few people in each concurrent ...

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Optical Art with R

July 16, 2012
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Optical Art with R

Last week, in a post entitled Bridget Riley exhibition in London, the author Markus Gesmann wrote an R script reproducing one of Riley's famous art pieces: Movement in Squares.This reminded me of my own first "brush" with Op art. It was in art class ye...

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Sourcing an R Script from Dropbox

July 14, 2012
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Working on my R bootcamp materials and I thought it would be handy to get the bootcamp computers setup by sourcing an R script that will install all necessary non-core packages in it. The problem? How to deploy this script efficiently. A quick method w...

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Smartphone operating system share mosaic plot

July 13, 2012
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Smartphone operating system share mosaic plot

(This article was first published on Actuarially (Matt Malin), and kindly contributed to R-bloggers) Smartphone operating system share mosaic plot Author: Matt Malin The increasing dominance of smartphones across the market is a very common topic in technology and news sites, with analysis of operating system share and phone types often shown in the media. Stumbling across this article...

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Dynamical systems: Mapping chaos with R

July 13, 2012
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Dynamical systems: Mapping chaos with R

Chaos. Hectic, seemingly unpredictable, complex dynamics. In a word: fun. I usually stick to the warm and fuzzy world of stochasticity and probability distributions, but this post will be (almost) entirely devoid of randomness. While chaotic dynamics are entirely deterministic, their sensitivity to initial conditions can trick the observer into seeing iid. In ecology, chaotic

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Health Care Costs – Part 2, "Unhealthy Things Not Related to the Problem"

July 11, 2012
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Health Care Costs – Part 2, "Unhealthy Things Not Related to the Problem"

Lighting Up Way back in the day, folks believed that smoking was not only cool but also completely safe. As Marcel Danesi states in his book Of Cigarettes, High Heels, and Other Interesting Things, Second Edition: An Introduction to Semiotics ...

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