According to respondents of the 2010 Rexer Analytics Data Miner Survey, open source R is the most commonly-used analysis tool amongst data miners: After a steady rise across the past few years, the open source data mining software R overtook other tools to become the tool used by more data miners (43%) than any other. STATISTICA, which has also...
Monthly Archives: March 2011
Plotting Indifference Curves with R Contour Function
The following post at Constructing Difference Curves - Part 3 from economics.about.com provides a discussion on indifference curves (but actually I think they are isoquants) and how to construct them. I think I have a grasp on how to do this in R if yo...
Script for Geostatistics with R
I received requests for the script used during the tutorial.All the material is available in the main page of the course.However, in order to facilitate the availability of the scripts to all the viewers of this blog I've put the link to donwnload them...
ggheat : a ggplot2 style heatmap function
I hope the code here is fairly self-explanatory with the inset annotations. I feel this is just a bit 'prettier' than heatmap.2 and has for me the right balance of options and extensibility. I have also found it difficult to produce high quality plots...
Programming Outside the Box: A Recursive Function in R
I heard a talk given by Ruby creator Yukihiro Matsumoto where he was rambling about how he came about becoming a programming language developer. He mentioned an important milestone as being his grasp of the idea behind recursion. I've kept that in mind...
Review: R Graphs Cookbook by Hrishi Mittal
Summary: Very useful for reference while producing graphs, and very comprehensive (including heat-maps, 3D graphs and maps). Reference: Mittal, H. V., 2011, R Graph Cookbook, Packt Publishing, Birmingham, UK, 272 pages, Publisher’s Website As a scientist I often need to plot graphs of my data, so I am keen to learn more about how to
Copula Functions, R, and the Financial Crisis
From: In defense of the Gaussian copula, The Economist
"The Gaussian copula provided a convenient way to describe a relationship that held under particular conditions. But it was fed data that reflected a period when housing prices were not correlated to the extent that they turned out to be when the housing bubble popped."
Decisions about...
Analyzing big data with Revolution R Enterprise
This post from Sherry LaMonica is the first in a series from members of the Revolution Analytics Engineering team — ed. Do you know about the big data capabilities in the RevoScaleR package, included with every Revolution R Enterprise installation? RevoScaleR provides a framework for fast and efficient multi-core processing of large data sets. You can visualize and model...
Comparison of GISS LOTAs During 5 El Nino – La Nina Cycles
In this post I compare GISS LOTAs during 5 El Nino – La Nina cycles (2010, 1998, 19883, 1973 and 1970). El Nino – La Nina Cycles In a previous post I showed the Nino 34 SSTA cycles for 2010, … Continue reading →
An easier to use IV regression command in R
Update: I have added some functionality to my ivregress() command. Check out my newer post here.After I posted my last video tutorial on how to use my IV regression function, I received a comment asking why I didn't write the command a different way t...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
