November 2012

Fun with R graphics: A raptor and a cake

November 15, 2012 | vinuct

I like to explore the graphics features of R.  Base graphics, ggplot2 are my favourites. On  other graphics packages, I haven’t used plotrix much. I am currently exploring grid package. Raptor First one is using ggplot2. (you could also do … Continue reading →The post Fun with R graphics: A ... [Read more...]

Regime Detection Pitfalls

November 14, 2012 | systematicinvestor

Today, I want to address some questions that I was getting regarding the Regime Detection post. In the Regime Detection post I showed an example based on the simulated data, and some of you tried to apply this example to actual stocks. There is one big problem that you have ... [Read more...]

Rcpp and the new R:: namespace for Rmath.h

November 14, 2012 | Thinking inside the box

We released Rcpp 0.10.0 earlier today. This post will just provide a simple example for one of the smaller new features -- the new namespace for functions from Rmath.h -- and illustrate one of the key features (Rcpp attributes) in passing. R, as a statistical language and environment, has very ... [Read more...]

Have my old job!

November 14, 2012 | richierocks

My old job at the Health & Safety Laboratory is being advertised, and at a higher pay grade to boot.  (Though it is still civil service pay, and thus not going to make you rich.) You’ll need to have solid mathematical modelling skills, particularly solving systems of ODEs, and be ... [Read more...]

Rcpp 0.10.0

November 14, 2012 | Thinking inside the box

Rcpp release 0.10.0 is now on CRAN and being uploaded to Debian. This is a new feature release, and we are very exciting about the changes, notably Rcpp attributes which make using C++ from R even easier than inline (see below as well as the new vignette for details and first ... [Read more...]

Big Data ETL and Big Data Analysis

November 14, 2012 | prasoonsharma

I was at Strata New York 2012 last month. Great conference! Thanks O'Reilly media for assembling the industry leaders and running it well.I understand it was too crowded for some of my out-of-town friends. Stepping out to the streets of mid-town Manhat... [Read more...]

Textual Healing

November 14, 2012 | is.R()

While I know there are several awesome guides for how to make fine-tuning adjustments to plot labels/axes/ticks/text in ggplot, this is still the most common question I get from people new to ggplot: how do I change the size/font/color/position of (som... [Read more...]

Expand delimited columns in R

November 14, 2012 | Eldon

A postdoctoral researcher asked me the other day to help him expand a vector of comma delimited values so he could do computations in R with it. I wrote an R function to solve the problem. Here is the before... [Read more...]

Building a Simple Web App using R

November 13, 2012 | stathack

I’ve been interested in building a web app using R for a while, but never put any time into it until I was informed of the Shiny package.  It looked too easy, so I absolutely had to try it out. First you need to install the package from the ... [Read more...]

Trees with the rpart package

November 13, 2012 | Christoph Molnar

What are trees? Trees (also called decision trees, recursive partitioning) are a simple yet powerful tool in predictive statistics. The idea is to split the covariable space into many partitions and to fit a constant model of the response variable in each partition. In case of regression, the mean of ... [Read more...]

Presentation at the RECENS Group

November 13, 2012 | Richard O. Legendi

I had a great opportunity to present my work on dynamic networks for the RECENS Group today at the  Hungarian Academy of Sciences, Centre for Social Sciences.It was a great honor, many thanks for the organizers, Károly Takács and Judit Pál for giving me the chance ... [Read more...]

My first R GUI

November 13, 2012 | Robert Norberg

This post is a huge jump from the last two - this is not for beginners!! But if you've ever considered building a GUI in R, looked at some of the online documentation, gotten scared, and decided not to, read this!!! Ok here goes. Dorian Auto GUI Setup: I built ... [Read more...]

SAP CodeJam Montreal

November 13, 2012 | Alvaro "Blag" Tejada Galindo

Thanks to an initiative of Krista Elkin, Jonathan Druker and myself ( with a lot of support from Craig Cmehil and Helena Losada ), SAP CodeJam Montreal is going live on Thursday, December 13, 2012 from 3 to 9 pm in the SAP Labs Montreal offices.This is... [Read more...]
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