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 mit R (Data design with R).
Matt’s goal with the
data.tablepackage is to reduce times; time to write code and to execute code. His talk illustrated how the syntax of
data.table, not unlike SQL, can produce shorter and more readable code that at the same time provides an efficient and fast way to analyse big in memory data sets with R. Arun presented on new developments in
data.table 1.8.11, which not only fixes bugs but adds many new features such as melt/cast and further speed gains.
I said early that
data.tablerocks. For more details see the
Data design with R
|Thomas Rahlf: Datendesign mit R|
Thomas Rahlf talked about his forthcoming book Datendesign mit R (Data design with R). He shared with us his motivations and aims for the book. In his opinion there are many books that present beautiful charts and concepts (e.g. Tufte’s books), but then don’t show how they can be reproduced, as there are often done with software such as Adobe Illustrator. Or books explain the graphical functions of a software, yet fail to demonstrate how to create beautiful charts with them. Thus, Thomas’ book will contain 100 examples demonstrating that desktop publishing quality charts can be produced with R and in some cases with the help of LaTeX. Indeed, all examples have about 40 lines of code and use the base R graphics system only and not
gridor any add-ons such as
The book’s accompanying web site gives you a taster already. The book itself will be published by Open Source Press next month.
The SchnitzelOf course the evening ended with Schnitzel and Kölsch at the Lux.
|The Luxus Schnitzel. Photo by Günter Faes|
Next Kölner R meetingThe next meeting is scheduled for 26 February 2013 (Wednesday before Altweiber), with two talks by Diego de Castillo (Connecting R with databases) and Kim Kuen Tang (R and kdb+).
Please get in touch if you would like to present and share your experience, or indeed if you have a request for a topic you would like to hear more about. For more details see also our Meetup page.
Thanks again to Bernd Weiß for hosting the event and Revolution Analytics for their sponsorship.