Following up on yesterday's Rcpp 0.7.0 release, here is a quick example of why the new feastures can be so useful. The following R code defines a character variable gslrng. This variable contains a short C++ code segment, which is then transformed b...
Monthly Archives: December 2009
got R? get social science for R!
Drew Conway has a great list of 10 must-have R packages for social scientists. If you’re a social scientist (or really, any kind of scientist) who doesn’t use R, now is a great time to dive in and learn; there are tons of tutorials and guides out there (my favorite is Quick-R, which is incredibly
Rcpp 0.7.0
A new release of Rcpp awaits inclusion on CRAN and has also been sent as a .deb to Debian. It will hit mirrors over the next few days, in the meantime you can get it here as well. This release has a couple new features : inline support: the cfunction...
Rcpp 0.7.0
A new release of Rcpp awaits inclusion on CRAN and has also been sent as a .deb to Debian. It will hit mirrors over the next few days, in the meantime you can get it here as well. This release has a couple new features : inline support: the cf...
Because it’s Friday: The decline of empires
Here's a neat visualization of the decline of the British, Spanish, Portugese and French empires from 1800 to present day. It's definitely more art than stats -- judging by the relative size of India and Australia I think the circles are scaled to area, not population -- but it definitely does capture the drama and the ebb and flow...
Using Complex Numbers in R
This post is a continuation of my series dealing with matrix operations for image processing. My next goal is to demonstrate the construction of simple low-pass and high-pass spatial frequency filters in R. It’s easy enough to construct simple versions of these filters in R using the Fast Fourier Transform (also known as the FFT),
The unmarried parenthood rate in Mexico
Using data from the INEGI I calculated the percentage of births who were born outside of marriage in Mexico and compared it to the Hispanic rate in the US. They are basically the same. There’s been a gigantic increase that’s slouching towards 50% a...
Plot ROC curve and lift chart in R
This tutorial with real R code demonstrates how to create a predictive model using cforest (Breiman’s random forests) from the package party, evaluate the predictive model on a separate set of data, and then plot the performance using ROC curves ...
SAS and R included on R bloggers
The R bloggers site is an aggregator for blogs about R. We're excited to be joining that community and suggest any readers of this blog may also find it useful.
Visualizing Data with R and ggplot2 (video w/ slides)
On December 3, 2009 I presented a brief talk at the NYC R meetup on how to create data visualizations with R using the immensely powerful ggplot2 package. The talk is very light on motivation but heavy on examples, so it may be more useful to those with some R and/or ggplot2 experience.
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
