Blog Archives

Whale charts – Visualising customer profitability

January 7, 2014
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Whale charts – Visualising customer profitability

The Christmas and New Year's break is over, yet there is still time to return unwanted presents. Return to Santa was the title of an article in the Economist that highlighted the impact on online retailers, as return rates can be alarmingly high. The article quotes a study by Christian Schulze of the Frankfurt School...

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Review: Kölner R Meeting 13 December 2013

December 17, 2013
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Review: Kölner R Meeting 13 December 2013

Last week's Cologne R user group meeting was the best attended so far. Well, we had a great line up indeed. Matt Dowle came over from London to give an introduction to the data.table package. He was joined by his collaborator Arun Srinivasan, who is based in Cologne. Their talk was followed by Thomas Rahlf on Datendesign...

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Next Kölner R User Meeting: 13 December 2013

December 10, 2013
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Next Kölner R User Meeting: 13 December 2013

Quick reminder: The next Cologne R user group meeting is scheduled for this Friday, 13 December 2013. We are delighted to welcome: Matt Dowle and Arun Srinivasan: Introduction to data.table Thomas Rahlf: Book presentation - Datendesign mit R Further details and the agenda are available on our KölnRUG Meetup site. Please sign up if you would like to...

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R in Insurance Conference, London, 14 July 2014

December 3, 2013
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R in Insurance Conference, London, 14 July 2014

Following the very positive feedback that Andreas and I have received from delegates of the first R in Insurance conference in July of this year, we are planning to repeat the event next year. We have already reserved a bigger auditorium. The second conference on R in Insurance will be held on Monday 14 July 2014...

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Not only verbs but also believes can be conjugated

November 26, 2013
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Not only verbs but also believes can be conjugated

Following on from last week, where I presented a simple example of a Bayesian network with discrete probabilities to predict the number of claims for a motor insurance customer, I will look at continuos probability distributions today. Here I follow example 16.17 in Loss Models: From Data to Decisions . Suppose there is a class of risks...

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Predicting claims with a bayesian network

November 19, 2013
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Predicting claims with a bayesian network

Here is a little Bayesian Network to predict the claims for two different types of drivers over the next year, see also example 16.16 in . Let's assume there are good and bad drivers. The probabilities that a good driver will have 0, 1 or 2 claims in any given year are set to 70%, 20% and 10%,...

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googleVis 0.4.7 with RStudio integration on CRAN

November 12, 2013
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googleVis 0.4.7 with RStudio integration on CRAN

In my previous post, I presented a preview version of googleVis that provided an integration with RStudio's Viewer pane (introduced with version 0.98.441).Over 80% in my little survey favoured the new default output mechanism of googleVis within RStudi...

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Display googleVis charts within RStudio

November 5, 2013
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Display googleVis charts within RStudio

The preview version 0.98.441 of RStudio introduced a new viewer pane to render local web content and with that it allows me to display googleVis charts within RStudio rather than in a separate browser window. I think this is a rather nice feature and...

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High resolution graphics with R

October 29, 2013
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High resolution graphics with R

For most purposes PDF or other vector graphic formats such as windows metafile and SVG work just fine. However, if I plot lots of points, say 100k, then those files can get quite large and bitmap formats like PNG can be the better option. I just have to be mindful of the resolution.As an example I create the following...

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Review: Kölner R Meeting 18 October 2013

October 22, 2013
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Review: Kölner R Meeting 18 October 2013

The Cologne R user group met last Friday for two talks on split apply combine in R and XLConnect by Bernd Weiß and Günter Faes respectively, before the usual Schnitzel and Kölsch at the Lux.Split apply combine in R The apply family of functions in R is incredible powerful, yet for newcomers often somewhat mysterious....

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