2698 search results for "GIS"

Producing grids of plots in R with ggplot2: A journey of discovery

August 26, 2010
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Producing grids of plots in R with ggplot2: A journey of discovery

I’ve just gone through a bit of a ‘journey of discovery’ in R while trying to plot a grid of plots for one of the research projects I’m doing. I wanted to write a simple function which could produce this grid of plots from a CSV file, allowing me to easily view the trends of

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informality, the 2010 edition

August 24, 2010
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For the last two cycles I’ve done some simple regression analysis of the informal vote.  I saw Possum have his go at it, using a specification that is virtually the same as what I’ve run in the past (2007, 2004). The 2010 edition follows.  As usual, electorate-level informality in House of Reps voting increases with

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Webinar: Big Data Analysis with Revolution R

August 24, 2010
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Don't forget that I'll be hosting a webinar tomorrow talking about the new RevoScaleR package included with the forthcoming Revolution R Enterprise 4.0. The webinar will also feature a live demonstration from Joseph Rickert. The full details are below, and you can register for the webinar here. Big Data Analysis for R Using Revolution R Enterprise Date: Wednesday, Aug...

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GRASS Can Make Pretty Maps

August 23, 2010
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GRASS Can Make Pretty Maps

I have posted a couple examples in the past on the topic of high quality map production from GRASS GIS-- usually via the Generic Mapping Tools. I am not sure why, but I have previously avoided using the traditional cartographic output module that is bu...

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Global Temperature Proxy Reconstructions ~ Bayesian extrapolation of warming w/ rjags

August 22, 2010
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Global Temperature Proxy Reconstructions ~ Bayesian extrapolation of warming w/ rjags

Update: fixed projection. There are a bunch of “hockey sticks” that calculate past global temps. through the use of proxies when instrumental data is absent. There is a new one out there by McShane and Wyner (2010) that’s creating quite a stir in the blogosphere (here, here, here, here). The main take out being, that

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Using R for Introductory Statistics, Chapter 3.4

August 21, 2010
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Using R for Introductory Statistics, Chapter 3.4

...a continuing journey through Using R for Introductory Statistics, by John Verzani. Simple linear regression Linear regression is a kooky term for fitting a line to some data. This odd bit of terminology can be blamed on Sir Francis Galton, a proli...

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Using R for Introductory Statistics, Chapter 3.4

August 21, 2010
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Using R for Introductory Statistics, Chapter 3.4

...a continuing journey through Using R for Introductory Statistics, by John Verzani. Simple linear regression Linear regression is a kooky term for fitting a line to some data. This odd bit of terminology can be blamed on Sir Francis Galton, a proli...

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Using JAGS in R with the rjags Package

August 20, 2010
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Get Everything Set Up I’m going to assume that you have access to a machine that will run JAGS. If you don’t, then you should be able to use WinBUGS, which is very easy to get set up. Unfortunately, the details of what follows may not help you as much if you’re using WinBUGS. To

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Myths about Ciudad Juarez

August 18, 2010
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Myths about Ciudad Juarez

Last year there were over 2,600 murders in Ciudad Juarez, and if the more than 1,800 murders so far this year are any indications, there will be even more murders in 2010. Ciudad Juarez is a scary place, but it wasn't always that way... I learned from Noel Maurer's Blog that Ciudad Juarez used to have a low murder...

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Myths about Ciudad Juarez

August 18, 2010
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Myths about Ciudad Juarez

Last year there were over 2,600 murders in Ciudad Juarez, and if the more than 1,800 murders so far this year are any indications, there will be even more murders in 2010. Ciudad Juarez is a scary place, but it wasn't always that way... I learned from Noel Maurer's Blog that Ciudad Juarez used to have a low murder...

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