pre{ solid black 1px;} I've recently offered an extra set of hands to Dirk to work on the Rcpp package, this serves a good excuse to learn more about C++ Exception management was quite high on my list. C++ has nice exception handling (well not ...
Monthly Archives: December 2009
Speed-reading files, revisited
In a post earlier this month, it seemed as though compressing a data file before reading it into R could save you some time. With some feedback from readers and further experimentation, we might need to revisit that conclusion To recap, in our previous experiment it took 170 seconds to read a 182Mb text file into R. But if...
tooltips in R graphics; nytR package
At Doug Rivers’ suggestion, I started investigating tooltips as a way to label points in R graphs. An example appears at the top of my blog, where I plot the ideal points (revealed preferences) of the (current) 111th U.S. House of Representatives against Obama vote share in their district in 2008 (SVG). I’m using the
inline 0.3.4 released
Oleg has updated the inline package to version 0.3.4 which is now on CRAN. It is includes my patch for both Rcpp support as well as extended header / library options for PKG_CPPFLAGS, PKG_CXXFLAGS, and PKG_LIBS which I had mentioned recently here an...
inline 0.3.4 released
Oleg has updated the inline package to version 0.3.4 which is now on CRAN. It is includes my patch for both Rcpp support as well as extended header / library options for PKG_CPPFLAGS, PKG_CXXFLAGS, and PKG_LIBS which I had mentioned recently here and h...
inline 0.3.4 released
Oleg has updated the inline package to version 0.3.4 which is now on CRAN. It is includes my patch for both Rcpp support as well as extended header / library options for PKG_CPPFLAGS, PKG_CXXFLAGS, and PKG_LIBS which I had mentioned recently here an...
Introduction to the Grammar of Graphics with ggplot2 in R
A detailed introduction to the Grammar of Graphics as implemented in R with the data visualization library ggplot2. This talk was given by Harlan Harris to the NYC R Statistical Meetup on December 3, 2009.
Example 7.19: find the closest pair of observations
Suppose we need to find the closest pair of observations on some variable x. For example, we might be concerned that some data had been accidentally duplicated. We return the ID's of the two closest observations, and their distance from each other. In both languages, we'll first create the data, then sort it, recognizing that the...
Estimated Net Worth of SoilWeb- Our Online Soil Survey
According to the excellent source code evaluation tool, SLOCCount, our online soil survey (SoilWeb) code is worth about $268,543 and would require about 2 years of development time to re-create from scratch with a single developer working full-time. This is a fairly close estimate, as I have been working (part-time) on this code-base for 3 years now...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
