Recently at work we got sent a data file containing information on donations to a specific charitable organization, ranging all the way back to the 80′s. Usually, when we receive a dataset with a donation history in it, each row … Continue reading →
At the Strata conference in New York today, Steve Yun (Principal Predictive Modeler at Allstate's Research and Planning Center) described the various ways he tackled the problem of fitting a generalized linear model to 150M records of insurance data. He evaluated several approaches: Proc GENMOD in SAS Installing a Hadoop cluster Using open-source R (both on the full data...
No the title doesn’t refer to how Katy Perry suffered at another of Jimmy Savile’s sexual predelictions, although these are two of the participants. I’ll get to the details later Just over a year ago, I reflected on the relative wiki searches of leading female singing celebrities, including Ms Perry. In the light of the
In its simplest form, a palette in R is simply a vector of colors. This vector can be include the hex triplet or R color names.The default palette can be seen through palette(): > palette("default") # you'll only need this line if you've previ...
Recently, my friend posted on her Facebook account about the article published by the National Statistical Coordination Board (NSCB) about poverty and unemployment in the country. Looking at the report I saw a lot of tables, so I thought why not ...
R is a programming language for mathematics and statistics. There are several R libraries available to support web development, including rjson and RJSONIO (note case – R library names are case sensitive). RJSONIO is based on rjson, but with modifications to improve performance working with large JSON payloads. The example below returns the data required
Lately I’ve been thinking about how to measure the fatness of the tails of a distribution. After some searching, I came across the Pareto Tail Index method. This seems to be used mostly in economics. It works by finding the decay rate of the tail. It’s complicated, both in formula and in it’s R implementation
In a recent post, I illustrated how to add a background geom to your ggplot. While that code worked, and the plot looked fine, it was pointed out to me that I was missing an important aspect of plot layering with ggplot2. Namely, it is not, as I previ...
I have started to work with R and STATA together. I like running regressions in STATA, but I do graphs and setting up the dataset in R. R clearly has a strong comparative advantage here compared to STATA. I was writing a function that will give me a (balanced) panel-structure in R. It then simply
Rcpp modules just got more flexible (as of revision 3838 of Rcpp, to become 0.9.16 in the future).
modules have allowed exposing C++ classes for some time now, but developpers had to declare custom wrap and as specializations if they wanted their classes to be used as return type or argument type of a C++ function or method....
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
