A while back a friend asked me for advice about speeding up some R code that they’d written. Because they were running an extensive Monte Carlo simulation of a model they’d been developing, the poor performance of their code had become an impediment to their work. After I ... [Read more...]

The world of Data Visualization offers infinite variants to display our Data. However, there is still some reluctance in exploiting all the possibilities that computers give us nowadays in this field, probably not because of a rejection of novelties but … Continue reading → [Read more...]

Many people are of the opinion that R has a corner on convenient data analysis.  That may or may not be true. But now R literally has a corner that makes data analysis more convenient.  If you have a data frame or a matrix with a few columns, then you ... [Read more...]

This is just a quick post (after a long absence) to quickly share my first Shiny attempt. The aim is to make available mechanistic models to coworkers through a web-based interface. I had planned to use RApache and RGTK+, but the arrival of Shiny has ... [Read more...]

Getting started with the R2MLwiN packageWith the release of the R2MLwiN package late 2012, R users have access to another software package for running Bayesian models using Markov chain Monte Carlo (MCMC) methods. R2MLwiN is an R command interface to MLwiN, allowing users to fit multilevel models using ... [Read more...]

I posted a question over on StackOverflow on an efficient way of comparing two data frames with the same column structure, but with different rows. What I would like to end up with is an n x m logical matrix where n and m are the number of rows in ... [Read more...]

This is the third article of the Maps in R series. After having shown how to draw a map without placing data on it and how to plot point data on a map, in this installment the creation of a … Continue reading → [Read more...]

I am a big fan of lattice/latticeExtra. In fact, nearly all visualisations I have produced so far make use of this great package. The possibilities for customisation are endless and the amount of flexibility it provides is especially valuable for produ... [Read more...]

I posted a new version of the "RcmdrPlugin.KMggplot2" package, which is an Rcmdr plug-in for a "ggplot2" GUI front-end. This package assists you to make "ggplot2" graphics. RcmdrPlugin.KMggplot2 (CRAN) NEWS Changes in version 0.2-0 (2013-01-23) Added themes: classic, minimal (ggplot2-0.9.3). Added t… [Read more...]

I posted a new version of the ”RcmdrPlugin.KMggplot2” package, which is an Rcmdr plug-in for a ”ggplot2” GUI front-end. This package assists you to make ”ggplot2” graphics. RcmdrPlugin.KMggplot2 (CRAN) NEWS Changes in version 0.2-0 (2013-01-23) Added the [Read more...]

With the arrival earlier today of the stochvol package onto the CRAN network for R, our Rcpp project reached a new milestone: 100 packages have either a Depends:, Imports: or LinkingTo: statement on it. The full list will always be at the bottom of ... [Read more...]

[This article was first published on OutSpoken Data, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your [Read more...]

The most recent edition of the Revolution Newsletter is out. The news section is below, and you can read the full January edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to get it monthly via email. Top Innovator, Big Data Technologies. ... [Read more...]

In this post we will talk about 7 different ways to perform a metric multidimensional scaling in R. Multidimensional Scaling Multidimensional Scaling (MDS), is a set of multivariate data analysis methods that are used to analyze similarities or dissimilarities in data. One of the nice features of MDS is that it ... [Read more...]

I am a computer science researcher, usually working on both Windows and Linux system. Windows is the place where I do the document work, like reading paper, browsing the internet, writing papers with LaTex… Linux is where I run and generate experimental results. The Chaos After years of messy data ... [Read more...]

In 2010, I wrote a short blog item about Florence Nightingale the statistician, solely because of its novelty value. I didn't even bother to look closely at the associated graphic she designed, but that's what I intend to do here. In this first installment, I reflect on her famous data visualization ... [Read more...]

As part of my long slog towards statistical understanding, I started making notes on the very specific topic of linear models. The details are tricky and hard to keep in mind, and it is difficult to go back and forth between books and notes to try to r... [Read more...]

In this article we’ll get up and running on the Semantic Web in less than 5 minutes using SPARQL with R. We’ll begin with a brief introduction to the Semantic Web then cover some simple steps for downloading and analyzing government data via a SPARQL query with the SPARQL ... [Read more...]

I think it has been beat to death that the incentives in academia lean heavily toward producing papers and less toward producing/maintaining software. There are people that are way, way more knowledgeable than me about building and maintaining software. For … Continue reading → [Read more...]

Create HTML page containing all package examples using knitr and markdown body, td { font-family: sans-serif; background-color: white; font-size: 12px; margin: 8px; } tt, code, pre { font-family: 'DejaVu Sans Mono', 'Droid San... [Read more...]