Blog Archives

Unknown pleasures

November 11, 2014
By
Unknown pleasures

Have I missed unknown pleasures in Python by focusing on R? A comment on my blog post of last week suggested just that. Reason enough to explore Python a little. Learning another computer language is like learning another human language - it takes time...

Read more »

Phase plane analysis in R

November 4, 2014
By
Phase plane analysis in R

The forthcoming R Journal has an interesting article about phaseR: An R Package for Phase Plane Analysis of Autonomous ODE Systems by Michael J. Grayling. The package has some nice functions to analysis one and two dimensional dynamical systems. As an example I use here the FitzHugh-Nagumo system introduced earlier:begin{align}dot{v}=&2 (w + v - frac{1}{3}v^3)...

Read more »

googleVis 0.5.6 released on CRAN

October 14, 2014
By
googleVis 0.5.6 released on CRAN

Version 0.5.6 of googleVis was released on CRAN over the weekend. This version fixes a bug in gvisMotionChart. Its arguments xvar, yvar, sizevar and colorvar were not always picked up correctly. Thanks to Juuso Parkkinen for reporting this issue.Exampl...

Read more »

Visualising the seasonality of Atlantic windstorms

October 7, 2014
By
Visualising the seasonality of  Atlantic windstorms

Last week Arthur Charpentier sketched out a Markov spatial process to generate hurricane trajectories. Here, I would like to take another look at the data Arthur used, but focus on its time component. According to the Insurance Information Institute, a normal season, based on averages from 1980 to 2010, has 12 named storms, six hurricanes and...

Read more »

Running RStudio via Docker in the Cloud

September 30, 2014
By
Running RStudio via Docker in the Cloud

Deploying applications via Docker container is the current talk of town. I have heard about Docker and played around with it a little, but when Dirk Eddelbuettel posted his R and Docker talk last Friday I got really excited and had to have a go myself....

Read more »

Managing R package dependencies

September 23, 2014
By
Managing R package dependencies

One of my take aways from last week's EARL conference was that R is more and more growing out of its academic roots into the enterprise. And with that come some challenges, e.g. how do I ensure consistent and systematic access to a set of R packages in an organisation, in particular when one team is providing...

Read more »

Notes from the Kölner R meeting, 12 September 2014

September 16, 2014
By
Notes from the Kölner R meeting, 12 September 2014

Last Friday we had guests from Belgium and the Netherlands joining us in Cologne. Maarten-Jan Kallen from BeDataDriven came from The Hague to introduce us to Renjin, and the guys from DataCamp in Leuven, namely Jonathan, Martijn and Dieter, gave an overview of their new online interactive training platform.RenjinMaarten-Jan gave a fascinating introduction to Renjin,...

Read more »

Next Kölner R User Meeting: Friday, 12 September 2014

September 9, 2014
By
Next Kölner R User Meeting: Friday, 12 September 2014

The next Cologne R user group meeting is scheduled for this Friday, 12 September 2014.We have a great agenda with international speakers: Maarten-Jan Kallen: Introduction to Renjin, the R interpreter for the JVM Jonathan Cornelissen, Martijn Theuwissen: DataCamp - An online interactive learning platform for R The event will be followed by drinks and schnitzel...

Read more »

Zoom, zoom, googleVis

September 2, 2014
By
Zoom, zoom, googleVis

The Google Charts API is quite powerful and via googleVis you can access it from R. Here is an example that demonstrates how you can zoom into your chart. In the example below I set the maximum zoom level to 5% of the chart. Drag and pan with a left mo...

Read more »

ChainLadder 0.1.8 released

August 26, 2014
By
ChainLadder 0.1.8 released

Over the weekend we released version 0.1.8 of the ChainLadder package for claims reserving on CRAN. What is claim reserving?The insurance industry, unlike other industries, does not sell products as such but promises. An insurance policy is a promise by the insurer to the policyholder to pay for future claims for an upfront received premium. As a result...

Read more »