824 search results for "Maps"

What I need to know…

June 19, 2010
By

is maps and geographical data representation in R. In case you’re curious too this is a good study material from R-Bloggers : maps ; geographical ; spatial Ok. This could be a tweet rather than a post…

Read more »

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...

Read more »

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...

Read more »

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

June 12, 2010
By
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

Read more »

Plotting BP Oil Spill Testing Data using R

June 10, 2010
By
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...

Read more »

biomaRt and GenomeGraphs: a worked example

June 6, 2010
By
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

Read more »

House Mountain Hike

May 17, 2010
By
House Mountain Hike

My wife Mary and my Dad Wesley and I took a hike this weekend (5/14/10) to the House Mountain state recreation area in Knox county, Tennessee. The hike was about 3.8 miles with a total elevation gain of around 1000 feet (940.23ft by GPS). The plot below gives the elevation profile over the course of

Read more »

Rcpp 0.8.0

May 12, 2010
By

Summary Version 0.8.0 of the Rcpp package was released to CRAN today. This release marks another milestone in the ongoing redesign of the package, and underlying C++ library. Overview Rcpp is an R package and C++ library that facilitates integr...

Read more »

Collect and Parse GPS (NMEA0183) Data in R

May 11, 2010
By

I recently wrote a serial connection for R-2.11.0 so that I can communicate with serial devices, for example an old Garmin eTrex Legend. This GPS device is able to output NMEA0183 sentences to a standard serial port (4800,8,1,N). I hooked up the device and used the serial connection to collect some data using some R

Read more »

Example 7.31: Contour plot of BMI by weight and height

April 5, 2010
By
Example 7.31: Contour plot of BMI by weight and height

A contour plot is a simple way to plot a surface in two dimensions. Lines with a constant Z value are plotted on the X-Y plane.Typical uses include weather maps displaying "isobars" (lines of constant pressure), and maps displaying lines of constant e...

Read more »