2309 search results for "map"

Statistical Analysis and Visualization of the Drug War in Mexico

June 15, 2010
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Statistical Analysis and Visualization of the Drug War in Mexico

On December 11, 2006 Felipe Calderon, as the first significant act of his presidency, sent the army to his home state of Michoacan. He claimed that it was to regain control of territories lost to the drug cartels, and indeed, a new cartel had started operating in Michocan. But the fact that he won the election by the slim margin of...

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Statistical Analysis and Visualization of the Drug War in Mexico

June 15, 2010
By
Statistical Analysis and Visualization of the Drug War in Mexico

On December 11, 2006 Felipe Calderon, as the first significant act of his presidency, sent the army to his home state of Michoacan. He claimed that it was to regain control of territories lost to the drug cartels, and indeed, a new cartel had started operating in Michocan. But the fact that he won the election by the slim margin of...

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In case you missed it: May Roundup

June 14, 2010
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In case you missed them, here are some articles from last month of particular interest to R users. We linked to 13 videos for learning R, from the basics ("What is R?") to more advanced topics. We noted the release of R 2.11.1. We announced that Revolution Analytics makes its software available free of charge to the academic community....

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R Tools for Dynamical Systems ~ bifurcation plot in R for system of ODEs

June 12, 2010
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R Tools for Dynamical Systems ~ bifurcation plot in R for system of ODEs

As per request, here is the code that I wrote to draw bifurcation plots in R. Bifurcation diagrams for discrete maps can be done using this code by James Jones. It is a little easier since approximation is not needed. In the following code, I used the deSolve library to draw bifurcation diagrams for a

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Plotting BP Oil Spill Testing Data using R

June 10, 2010
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Plotting BP Oil Spill Testing Data using R

The Deepwater Horizon Incident is in the U.S. headlines and on many peoples minds. The folks over at Revolution Analytics were even discussing this subject today. Several government sites including the NOAA have sections dedicated to the problem. In...

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Thoughts on Making Data Work

June 9, 2010
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I really enjoyed all four talks at today's online conference, Making Data Work. (Disclosure: Revolution sponsored this conference.) I thought the four speakers together gave a great overview of issues related to the processing, analysis, and visualization of big data. Mike Driscoll started off with a useful categorization for data size. "Small Data" (<10Gb) fits in the memory of...

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Ruby Script to parse ISBNs listed in R-Project to populate an Amazon

June 7, 2010
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Ruby Script to parse ISBNs listed in  R-Project to populate an Amazon

As you probably figured out, I am an Amazon affiliate and have been giving some thought to how to get the best lists of R books available at Amazon. To get the list of ISBNs from R-Project, the following Ruby script did the trick:require 'rubygems'req...

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biomaRt and GenomeGraphs: a worked example

June 6, 2010
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biomaRt and GenomeGraphs: a worked example

As promised a few posts ago, another demonstration of the excellent biomaRt package, this time in conjunction with GenomeGraphs. Here’s what we’re going to do: Grab some public microarray data Normalise and get a list of the most differentially-expressed probesets Use biomaRt to fetch the genes associated with those probesets Plot the data using GenomeGraphs

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MODIS processing with R, GDAL, and the NCO tools

June 3, 2010
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MODIS processing with R, GDAL, and the NCO tools

I use MODIS data for analysis of vegetation dynamics around the world.  The native HDF file format provided by NASA is great for archiving the data (it's amazing how much information they include in each file), but unfortunately there aren't many ...

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MODIS processing with R, GDAL, and the NCO tools

June 3, 2010
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MODIS processing with R, GDAL, and the NCO tools

I use MODIS data for analysis of vegetation dynamics around the world.  The native HDF file format provided by NASA is great for archiving the data (it's amazing how much information they include in each file), but unfortunately there aren't many tools for directly (and easily) extracting data stored across files like there are for the

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