Yes...I haven't been updating the blog for a very long while...But I'm really busy with many things right know.... Our paper for the "Cultural Evolution in Spatially Structured Populations" have been accepted so we are currently working on that, and I ...
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R Plotting tips
Yes...I haven't been updating the blog for a very long while...But I'm really busy with many things right know.... Our paper for the "Cultural Evolution in Spatially Structured Populations" have been accepted so we are currently working on that, and I ...
Installing rgdal on Mac OS X
The rgdal package contains bindings from R to the GDAL (Geospatial Data Abstraction Library) as well as the PROJ library. It is a dependency for numerous spatial statistics packages. Note that the binaries on the rgdal homepage are outdated — the most up-to-date version of the rgdal package can be found on CRAN. Unsurprisingly, rgdal
Cherry Picking to Generalize ~ retrospective meta-power analysis using Cohen’s f^2 of NASA temp + visualization
Previously, I plotted a grid of NASA GISS global temps in ggplot2 to show general trends by the brute force method. Here, I will again use the brute force method to do a simple power analysis on a portion of the data (data here). The general aim is to figure out what the minimum sample 
Starting an EC2 Machine Then Setting Up a Socks Proxy… From R!
I do some work from home, some work from an office in Chicago and some work on the road. It’s not uncommon for me to want to tunnel all my web traffic through a VPN tunnel. In one of my previous blog posts I alluded to using Amazon EC2 as a way to get around
Wanted: Big-data beta testers
We're nearing completion of the package of statistical tools for very large data sets that I gave an early preview of at R/Finance 2010. It will be released for Revolution R Enterprise later this year, but we're looking for some R users with big data sets to put the 1.0 version through its paces in the beta program and...
Revolution at useR! 2010
Revolution Analytics is a proud sponsor of this year's annual R user conference, useR! 2010, and many members of the Revolution team will be there at Gaithersburg next week. We'll be hosting a booth at the conference where you can come up and meet the team, and see some of the new features being developed for Revolution R in...
Homicide in North America
I'm surprised by how similar the trends are (excluding the drug war in Mexico). There were big decreases in the homicide rate in all three countries starting in the early nineties, which then slowed down around 2000. The homicide rates for Mexicans ...
Homicide in North America
I'm surprised by how similar the trends are (excluding the drug war in Mexico). There were big decreases in the homicide rate in all three countries starting in the early nineties, which then slowed down around 2000. The homicide rates for Mexicans ...
Chaos in the Financial Markets?
Over the years I've had quite a few interested individuals ask me about Chaos and its applications towards trading. Well, as hidden markov models and speech processing were made popular by James Simons and his team at Renaissance Technologies, one cou...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
