After reproducing all original figures and tables from Universal Portfolios, R coupled with modern processors allows to perform some more analysis.First we calculate the final wealth of the universal portfolio for all possible pairs of stocks, and...
At first, this post was intended to describe how to manipulate dates with R but, as the idea was coming from the question of one of my students who wanted to analyze his SMS, I thought that I might as well also explain the whole analysis process... Using my new smartphone (that I started to
This post shows how to create a timeline graph by using ggplot2. Let’s start by loading the ggplot2 library. Next let’s create a dataset which we will use to feed the graph. In the last column (y), I create random positive values for the first three rows (which will be Read more...
Welcome to this demo of how R code and results can be combined into an HTML report. This entire blogpost was generated by using a combination of R, knitr and markdown. Beforehand, make sure you have the following libraries installed (latest version); knitr markdown ggplot2 (to run the example script) Read more »
Going to supper in 20 minutes. I’d like to type down my solution to the 12th Euler problem, just make my time count. The sequence of triangle numbers is generated by adding the natural numbers. So the 7th triangle number … Continue reading →
In the last R-User meeting in Cologne, we had a discussion about using ggplot2 – and I gave a short introduction of how to use ggplot2 with JGR and Deducer. Basically, JGR is a Graphical User Interface for R, and Deducer is a kind of “data analysis plugin”, that also comes with a so-called “plot 
As first reported by Paolo, the new R journal is out! You can Download the complete issue from here. Refereed articles may be downloaded individually using the links below. Table of Contents Editorial 3 Contributed Research Articles Analysing Seasonal Data Adrian G Barnett, Peter Baker and Annette J Dobson 5 MARSS: Multivariate Autoregressive State-space...
The biggest prize in UK soccer, the Premier League Championship, is decided by a points system. Unlike most sports competitions, there's no final round or playoff series: once the regular round of games is complete, the team that has accumulated the most points (three for a win, and one for a draw) is the champion of English football. In...
One of the great things about Twitter is that it’s a global conversation anyone can join anytime. Eavesdropping on the world, what what!
Of course, it gets even better when you can mine all this chatter to study the way humans live and interact.
For example, how do people in New York City differ from those in Silicon Valley? We...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
