I almost missed out on the R Journal for this month- great reading,
and I liked Dr Hadley’s article on stringr package the best. Really really useful package and nice writing too
http://journal.r-project.org/archive/2010-2/RJournal_2010-2_Wickham.pdf
(incidentally I just downloaded a local copy of his ggplot website at http://had.co.nz/ggplot2/ggplot-static.zip
I aim to really read that one up
Okay, announcement time
I just signed a contract with Springer for a book on R, some what in first half of 2011
” R for Business Analytics”
its going to be a more business analytics than a stats perspective ( I am a MBA /Mech Engineer)
and use cases would be business analytics cases. Do write to me if you need help doing some analytics in R (business use cases)- or want something featured. Big focus would be on GUI and easier analytics, using the Einsteinian principle to make things as simple as possible but no simpler)
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DECISION STATS 
Dear Ajay Ohri,
First of all thanks for keeping up a very interesting blog.
Reading your post on your fore coming book on R for Business Analytics, it occurred to me that you may be interested in browsing through my book “Data Mining with R, learning with case studies” by CRC Press. It is a practical book on the use of R for data mining. It presents a series of data mining case studies and it has an associated R package with all code and data. More details can be obtained at the book web page:
http://www.liaad.up.pt/~ltorgo/DataMiningWithR
All the best for your book project and 2011!
Luis Torgo