Articles by Markus Gesmann

R in Insurance Conference, London, 15 July 2013

December 19, 2012 | Markus Gesmann

The first conference on R in Insurance will be held on Monday 15 July 2013 at Cass Business School in London, UK. The intended audience of the conference includes both academics and practitioners who are active or interested in the applications of R in insurance.This one-day conference will focus on applications ...
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Now I see it! K-means cluster analysis in R

December 17, 2012 | Markus Gesmann

Of course, a picture on a computer monitor is a coloured plot of x and y coordinates or pixels. Still, I was smitten by David Sparks' posts on is.r(), where he shows how easy it is to read images into R to analyse them. In two posts [1], [2] he replicates ... [Read more...]

Comparing regions: maps, cartograms and tree maps

December 11, 2012 | Markus Gesmann

Last week I attended a seminar where a talk was given about the economic opportunities in the SAAAME (South-America, Asia, Africa and Middle East) regions. Of course a map was shown with those regions highlighted. The map was not that disimilar to the one below.
library(RColorBrewer)<br>library(rworldmap)<br>data(countryExData)<br>par(mai=c(0,0,0.2,0),xaxs="i",yaxs="i")<br>mapByRegion( countryExData, <br>             nameDataColumn="GDP_capita.MRYA",<br>             joinCode="ISO3", nameJoinColumn="ISO3V10",<br>             regionType="Stern", mapTitle=" ", addLegend=FALSE,<br>             FUN="mean", colourPalette=brewer.pal(6, "Blues"))
It is a map ... [Read more...]

Changing colours and legends in lattice plots

December 4, 2012 | Markus Gesmann

Lattice plots are a great way of displaying multivariate data in R. Deepayan Sarkar, the author of lattice, has written a fantastic book about Multivariate Data Visualization with R [1]. However, I often have to refer back to the help pages to remind myself how to set and change the legend ... [Read more...]

googleVis 0.3.0/0.3.1 is released: It’s faster!

October 23, 2012 | Markus Gesmann

Version 0.3.0 of the googleVis package for R has been released on CRAN on 20 October 2012. With this version we have been able to speed up the code considerably. The transformation of R data frames into JSON works significantly faster. The execution of the gvisMotionChart function in the World Bank demo is ...
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Review: Kölner R Meeting 5 October 2012

October 10, 2012 | Markus Gesmann

The third Cologne R user meeting took place last Friday, 5 October 2012, at the Institute of Sociology. The evening was sponsored by Revolution Analytics, who provided funding which went towards the Kölner R user group Meetup page. We had a good tur... [Read more...]

Using R in Insurance at GIRO 2012

September 17, 2012 | Markus Gesmann

Every year the UK’s general insurance actuarial community organises a big conference, which they call GIRO, short for General Insurance Research Organising committee. This year's conference is in Brussels from 18 - 21 September 2012. Despite the fac... [Read more...]

Are career motivations changing?

August 28, 2012 | Markus Gesmann

The German news magazine Der Spiegel published a series of articles [1, 2] around career developments. The stories suggest that career aspirations of young professionals today are somewhat different to those of previous generations in Germany. Apparen...
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Sigma motion visual illusion in R

August 21, 2012 | Markus Gesmann

Michael Bach, who is a professor and vision scientist at the University of Freiburg, maintains a fascinating site about visual illusions. One visual illusion really surprised me: the sigma motion. The sigma motion displays a flickering figure of bla... [Read more...]
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