Thanks to its use of Apple's vecLib for BLAS, LAPACK and related functions, the open source distribution of R performs many matrix calculations 2-10X faster than Revolution Analytics Community edition on Mac OS X systems.
Monthly Archives: October 2010
vecLib: Why Mac users are better off with Open Source R
R is Hot: Part 3
This is Part 3 of a five-part article series, with new parts published each Thursday. You can download the complete article from the Revolution Analytics website. Power from Elegance If the R movement has a genuine rock star, it’s probably Hadley Wickham. He’s an assistant professor and the Dobelman Family Junior Chair in Statistics at Rice University. He’s written...
Chicago R Meetup slides
Second stop of my world tour was chicago yesterday night, where I presented a quick light review of various ways to represent objects in R: lexical scoping, S3, S4, the new reference classes and also with C++ using Rcpp modules or RProtoBuf My sli...
Ricky Ponting and Sachin Tendulkar
There is a lot of hype in media about Ponting's best days being behind him. While he's rebuilding a fresh Aussie team, everyone is putting more pressure on him by comparing his performance with Tendulkar's. Leave him alone!We have the privilege of watc...
Ricky Ponting and Sachin Tendulkar
There is a lot of hype in media about Ponting's best days being behind him. While he's rebuilding a fresh Aussie team, everyone is putting more pressure on him by comparing his performance with Tendulkar's. Leave him alone!We have the privilege of watc...
What’s that 5km from the station “location”
In our last installment we looked at stations which were pitch black. The case I examined, Middlesboro Kentucky illustrated 1. The station location data used by Hansen2010 has inaccuracies. 2. While the purported station location was pitch dark, nearby within a couple 1/100ths of a degree there were urban lights. What this example illustrated was 
Finding presence data for species distribution modelling (SDM)
Getting presence data of species is often not easy and can be a major obstacle when attempting to model the distribution of species. One way is using the GBIF data base. Here I show one way how to obtain presence … Continue reading →
Installing rJava on Ubuntu
I had some troubles installing rJava on Ubuntu. The easiest solution I found was installing from the command line using: Then it worked without any problems.
The "tikzDevice" package
The tikzDevice package is quite amazing. Here are two graphs I just made, with (lower) and without (upper) using the tikzDevice package. The difference in quality is huge.Since the LaTeX source file for the figure is quite large in size and may take si...
The "tikzDevice" package
The tikzDevice package is quite amazing. Here are two graphs I just made, with (lower) and without (upper) using the tikzDevice package. The difference in quality is huge.Since the LaTeX source file for the figure is quite large in size and may take si...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
