I am still struggling to get a grasp of R's mapping capabilities. Part of my frustration lies in the fact that I often work on areas near the poles, which complicates interpolation across the 180 degree line. For smaller areas, interpolati...

Mirai Solutions GmbH (http://www.mirai-solutions.com) is pleased to release XLConnect 0.1-4. In the time since our first release (XLConnect 0.1-3, released on Feb 28, 2011) we received very positive and constructive feedback from the R community which heavily influenced the development … Continue reading →

In creating the numbers tool I wanted to be able to do two things, 1) obtain information about what source did by matching the numeric literals it contained against a database of ‘interesting’ values (now with over 14,000 entries) and 2) flag possible incorrect numeric literals (e.g., 3.1459265 when 3.14159265 had been intended in core/Helix.cpp

For those of you who don't subscribe to the R-SIG-Finance mailing list: You really should subscribe ;-)Dirk Eddelbuettel announced the R/Finance 2011 presentations are now available.I've included the entire announcement (with some hyperlinks) below.The organizing committee for the R/Finance 2011 conference is pleased to announce the availability of presentation slides from the 3rd annual R/Finance...

For those of you who don't subscribe to the R-SIG-Finance mailing list: You really should subscribe ;-) Dirk Eddelbuettel announced the R/Finance 2011 presentations are now available. I've included the entire announcement (with some hyperlinks) below.The organizing committee for the R/Finance 2011 conference is pleased to announce the availability of presentation slides from the 3rd annual R/Finance...

I received this email today: I have a question about the ets() function in R, which I am trying to use for Holt-Winters exponential smoothing. My problem is that I am getting very different estimates of the alpha, beta and gamma parameters using ets() compared to HoltWinters(), and I can’t figure out why. This is

Following up Conrad's 1.99.2 release (in RcppArmadillo 0.2.20), we now have Armadillo 1.99.3 en route to the upcoming 2.0.0 release. Armadillo is a templated C++ library for linear algebra---which RcppArmadillo brings to R based on our Rcpp library...

There is a nice R module for apache: rApache. So you can easily publish statistics.

In R functions sometimes produces warnings or errors. In the case of errors execution of a function or a series of commands can get halted when an error occurs, which can in some cases be frustrating especially if we want to continue our calculations. There are various functions available in R for dealing with errors

In this, Chomsky is in complete agreement with O’Reilly. (I recognize that the previous sentence would have an extremely low probability in a probabilistic model trained on a newspaper or TV corpus.)1 Anyone who considers themself an intellectual should be required to read this new essay by Peter Norvig. It’s the best summary I’ve ever

Last month's R/Finance 2011 conference in Chicago was an outstanding event, bringing together some of the best minds in applying R to financial data. Presentations from the speakers are now available for download, with a wealth of useful information there for anyone working in quantiative finance. Not to be missed, though, is John Bollinger's (yes, that John Bollinger) retrospective...

Opening this blog is a step in a long journey of discovery, learning and frustration. To begin with I would consider myself a beginner R user, I am getting better, but I am not about to write a package any time soon. I started using R about three years...

Opening this blog is a step in a long journey of discovery, learning and frustration. To begin with I would consider myself a beginner R user, I am getting better, but I am not about to write a package any time soon. I started using R about three years...

Online training provider Statistics.com has introduced a couple of new R-related courses which are well worth checking out. These are all self-paced on-line courses, with materials by and interactive feedback from leading R gurus. Current R users looking to take their programming skills to the next level will be particularly interested in the Advanced Programming in R course from...

A while ago I helped out a colleague who was testing some methods to detect economic (in)activity of companies, based on their quarterly tax declarations (our institute has access to such data). One of the thing my colleague wanted was to detect simple patterns, … Continue reading →