2813 search results for "gis"

Missouri: Comparison of Registered Voter Counts to Census Voting Age Population

August 13, 2012
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Missouri:  Comparison of Registered Voter Counts to Census Voting Age Population

By Earl F Glynn | Franklin Center A comparison of US Census voting age population data in Missouri to voter registration data shows a number of Missouri counties have bloated voter registration lists. Charts by county for the years 2000 to 2012 show how counties are maintaining their voter lists. Voter fraud potential is higher

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How to load the {rJava} package after the error “JAVA_HOME cannot be determined from the Registry”

August 7, 2012
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In case you tried loading a package that depends on the {rJava} package (by Simon Urbanek), you might came across the following error: Loading required package: rJava library(rJava) Error : .onLoad failed in loadNamespace() for ‘rJava’, details: call: fun(libname, pkgname) …Read more »

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R for Ecologists: Simulating Species-Area Curves (linear vs. nonlinear regression)

August 7, 2012
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R for Ecologists: Simulating Species-Area Curves (linear vs. nonlinear regression)

This post is about basic model simulation so we can get a feel for how curves are supposed to look given certain processes assumed by the model. One of the most prevalent patterns in ecology is the species-area (SAR) curve, which … Continue reading →

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R for Ecologists: Phylogenies in R

July 22, 2012
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R for Ecologists: Phylogenies in R

I’ve only recently begun working from an evolutionary perspective, and I can’t imagine why I haven’t thought about it much before. After all, it comes up in just about everything that we do in ecology. For example, I’m currently feeding … Continue reading →

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R for Ecologists: Creating a Site x Species Matrix

July 17, 2012
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R for Ecologists: Creating a Site x Species Matrix

Today I’m going to adress a fairly common problem in ecology that has been coming up frequently as of late. The issue is how to create a site x species matrix for community composition analysis (i.e. ordination). Moreover, ecologists have to do … Continue reading →

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R for Ecologists: Making MATLAB-like Graphs in R

July 13, 2012
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R for Ecologists: Making MATLAB-like Graphs in R

I’ve decided that my blog should become a brain dump for my experience/troubles/solutions to programming in R. I’ve met many people who want to learn but don’t have the time or patience to sit down and figure it out from … Continue reading →

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How many ecologists were on ECOLOG in 1992?

June 25, 2012
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How many ecologists were on ECOLOG in 1992?

Remember 1992? I had just turned 13 and was still a year away from highschool when my true descent into nerdom and the internet would begin. Back then it was with a local BBS (Bulletin Board System) run by a guy in a trailer park named Charlie and a 1200 baud modem on...

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National Registry of Exonerations charts with R

May 21, 2012
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National Registry of Exonerations charts with R

According to recent news (dallasnews.com) there is a new release of a public national database for wrongful convictions.  There are plenty of details in the public list including Age, Race, and how the conviction was overturned.  According to...

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useR! 2012: Call for Late-Breaking Posters; REGULAR REGISTRATION ENDS 12May

May 12, 2012
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*** Call for Late-breaking Posters *** Abstracts may be submitted for posters presenting recent developments and late-breaking applications of R, on topics as indicated in the earlier call for abstracts: http://biostat.mc.vanderbilt.edu/UseR-2012#Call_for_Abstracts_and_Tutorial Late-breaking posters will be displayed during the poster session alongside regular posters, and they will appear in the electronically published book of abstracts for the conference. However, these...

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A sociologist converts from Stata to R

May 7, 2012
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Ph.D candidate in sociology Ethan Fosse just switched from Stata to doing 100% of his analysis with R. His reasons? If you want to do Bayesian analysis or graph modeled coefficients (or work with complex data structures more generally), then R is much easier than Stata due to the object-oriented programming environment. It's unbelievably liberating to be able to...

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