April 2012

Using SNA in Predictive Modeling

April 10, 2012 | Matt Bogard

In a previous post, I described the basics of social network analysis. I plan to extend that example here with an application in predictive analytics. Let's suppose we have the following network (visualized in R)Suppose we have used the igraph package ...
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R at the Consumer Financial Protection Bureau

April 10, 2012 | David Smith

The O'Reilly Radar blog has a lengthy and very interesting interview with the lead and deputy CIOs of the Consumer Financial Protection Bureau, the new US government agency devoted to consumer protections in the financial markets. In that interview, they talk about the many open-source tools used in the agency (... [Read more...]

Working with strings

April 10, 2012 | Karsten W.

R has a lot of string functions, many of them can be found with ls("package:base", pattern="str"). Additionally, there are add-on packages such as stringr, gsubfn and brew that enhance R string processing capabilities. As a statistical language and environment, R has an edge compared to other programming ... [Read more...]

How to plot lattice and ggplot2 graphs with FastRWeb

April 10, 2012 | ronan

With print() If you are an advanced R user, you probably know the lattice and the ggplot2 packages. They allow you to plot elegant graphics with less code (Hocking, 2009 and Sueur, 2010). If you know these two packages, you should hardly use plot() for your graphs. If you read my article ... [Read more...]

R Source on GitHub

April 10, 2012 | Suraj Gupta

I added R source code v0.49 to v2.15.0 to a GitHub repository: r-source Each release is tagged by version number. This is an easy and accessible way to browse R source and diff with prior version. I couldn’t find a suitable alternative. ... [Read more...]

RcppDE 0.1.1

April 9, 2012 | Thinking inside the box

The RcppDE package required a bug-fix release. One of the tests compared results to those from the DEoptim package this is based upon, and these are no longer equal, leading the tests to fail. While I was at it, I finally committed a few more things t... [Read more...]

Piggybacking and Hopefully Publicizing R Experts

April 9, 2012 | klr

I was inspired by the Revolution Analytics blog post http://blog.revolutionanalytics.com/2009/11/charting-time-series-as-calendar-heat-maps-in-r.html on the d3.js style calendar heat map that Paul Bleicher from Humedica developed in R.  In an effo...
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R PMML Support: BetteR than EveR!

April 9, 2012 | Alex Guazzelli

PMML, the Predictive Model Markup Language, has become the de-facto standard to represent not only predictive models, but also data pre- and post-processing. In so doing, it allows for the interchange of models among different tools and environment... [Read more...]

Quick off the mark

April 9, 2012 | pssguy

With none of the top teams overimpressing this season, Alan Pardew’s performance with Newcastle – especially in the transfer market -is likely to see him receive coniderable recognition in the Manager of the Year award Recent acquisition, Papiss Cissé, has proved particularly fruitful with a brace against Swansea last time ... [Read more...]

Correlation Matrix (Constituents)

April 9, 2012 | jrcuesta

It is important to understand as better as possible our sample set before to develop the regression. Continuing with the “Y” matrix (constituent’s matrix) we have to observe the correlation matrix.In the R Graph Gallery, we can get the code to dr...
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Comparing Julia and R’s Vocabularies

April 9, 2012 | John Myles White

While exploring the Julia manual recently, I realized that it might be helpful to put the basic vocabularies of Julia and R side-by-side for easy comparison. So I took Hadley Wickham’s R Vocabulary section from the book he’s putting together on the devtools wiki, put all of the ... [Read more...]

Example 9.26: More circular plotting

April 9, 2012 | Ken Kleinman

SAS's Rick Wicklin showed a simple loess smoother for the temperature data we showed here. Then he came back with a better approach that does away with edge effects. Rick's smoothing was calculated and plotted on a cartesian plane. In this entry we'll explore another option or two for smoothing, ... [Read more...]

Ichimoku Clouds R Code Trading

April 9, 2012 | Fotis

Quantitative Finance, Technical Trading & Analysis. Fotis Papailias, Dimitrios Thomakos Fotis Quantitative Finance & Technical Trading Ichimoku Clouds R Code Trading Download the full program here Here you can find an R Code for Ichimoku Clouds analysis and trading. Have fun!   # The function for computing the Ichimoku cloud ichimoku [Read more...]

Looking to the difference spectrum

April 9, 2012 | jrcuesta

From the previous post, we can make the difference spectrum (once the samples are sorted by moisture) between the sample with the lowest moisture value (position 1), from the sample with the highest moisture value (position 66). This spectra will help ...
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Eclipse + Rcpp + RInside = Magic

April 8, 2012 | Ian

  I've been doing R/Java development for some time, creating packages both large and small with this tool chain. I have used Eclipse as my package development environment almost exclusively, but I didn't realize how much I relied on the IDE before I had to do some serious R/C++ ... [Read more...]
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