September 2012

How to use your favorite fonts in R charts

September 20, 2012 | David Smith

Today's guest post comes from Winston Chang, a software developer at RStudio — ed. When it comes to making figures in R, you can use any font you like, as long as it's Helvetica, Times, or Courier. Using other fonts that are installed on your computer can seem an impossible task, ... [Read more...]

Converting an R object to text, with dput()

September 20, 2012 | is.R()

We’ve already briefly covered making a reproducible example, but I thought I’d go a little more in-depth on the very helpful function dput(). Whenever I am having trouble applying an operation to some R object, and need help, but want to av... [Read more...]

garch estimation on impossibly long series

September 20, 2012 | Pat

The variability of garch estimates when the series has 100,000 returns. Experiment The post “Variability of garch estimates” showed estimates of 1000 series that were each 2000 observations long.  Here we do the same thing except that the series each have 100,000 observations. That would be four centuries of daily data.  It’s not ... [Read more...]

ISBA towards higher computing goals [yet another new section!!!]

September 19, 2012 | xi'an

Surrounding the great and exciting gathering of Bayesian statisticians in Kyoto last June, several ISBA sections have appeared in the past weeks, as already mentioned on the ‘Og. Along with Anto Mira and Nicolas Chopin (who did most of the organisational work while I was wandering down under!), we discussed ... [Read more...]

2012-5 Voronoi Treemaps in R

September 19, 2012 | akoh003

A Voronoi Treemap is a visualisation tool for displaying data with a hierarchical structure.  This article describes an open source implementation of Voronoi Treemaps in the R language and environment for statistical computing and graphics.  The article includes example usage … Continue reading → [Read more...]

FinancialInstrument Moves to CRAN

September 19, 2012 | Peter Carl

I thought I would break up the posts about GSOC (no, I’m not done yet – there are a few more to do) with a quick note about FinancialInstrument. The FinancialInstrument package provides a construct for defining and storing meta-data for tradable contracts (referred to as instruments, e.g., stocks, ... [Read more...]

Why are pirates called pirates?

September 19, 2012 | drunksandlampposts

In homage to International Talk Like a Pirate Day… I recently stumbled across a series of blog posts from the folks at IDV that visualised the archive of recorded pirate attacks which has been collected by the US National Geospatial-Intelligence Agency. It’s a dataset of 6000+ pirate attacks which have ... [Read more...]

Stock Market and US elections

September 19, 2012 | Fotis

Quantitative Finance, Technical Trading & Analysis. Fotis Papailias, Dimitrios Thomakos Fotis Quantitative Finance & Technical Trading Stock Market and US elections We made a very simple R file that historically gathers the period before and after the US elections. The inexperienced user has the ability to set the tickers of asset she ... [Read more...]

SPSS and R day in York

September 19, 2012 | Robert

On 2 November there are some introductory health-focussed training sessions on SPSS and R software going on in York: Two sets of two half-day parallel workshops and two tutorial sessions are provisionally planned to be held at the Alcuin Research … Continue reading → [Read more...]

(Unsurprisingly) users default to the defaults

September 19, 2012 | Luis

Oddities tend to jump out when one uses software in a daily basis. The situation is even clearer when using software for teaching: many more people looking at it with fresh eyes. Let’s say that we are fitting a simple … Continue reading → [Read more...]

Technical Analysis of Montana Voter Registration Files

September 18, 2012 | efg

By Earl F Glynn | Franklin Center This article shows how to analyze Montana voter registration files using R. The Montana Secretary of State sells two files of voter registration records for a fee of $1000: Statewide Voter File Voter History File The Montana Secretary of State provides information about the two ... [Read more...]

Automatic drug utilization reports with R and ggplot2

September 18, 2012 | John

This program takes a data set of drug utilisation of 4 fictional drugs in 10 fictional hospitals and plots each time-series with a locally weighted regression (Lowess) trend line. It also places an time-series trend of the usage for each … Continue reading → [Read more...]

RcppArmadillo 0.3.4.1

September 18, 2012 | Thinking inside the box

Conrad released the bug-fix release 3.4.1 of Armadillo earlier today, and the corresponding RcppArmadillo package 0.3.4.1 is already on CRAN. No R level or interface changes were, the upstream changes are summarized below. Changes in RcppArmadillo... [Read more...]

DESeq vs edgeR Comparison

September 18, 2012 | Stephen Turner

Update (Dec 18, 2012): Please see this related post I wrote about differential isoform expression analysis with Cuffdiff 2.DESeq and edgeR are two methods and R packages for analyzing quantitative readouts (in the form of counts) from high-throughput e... [Read more...]
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