Latest R Journal

Including juicy stuff on using a cluster of Apple Machines for grid computing , seasonality forecasting (Yet Another Package For Time Series )

But I kind of liked Sumo too-

Sumo is a fully-functional web application template that exposes an authenticated user’s R session within java server pages.

Sumo: An Authenticating Web Application with an Embedded R Session by Timothy T. Bergsma and Michael S. Smith Abstract Sumo is a web application intended as a template for developers. It is distributed as a Java ‘war’ file that deploys automatically when placed in a Servlet container’s ‘webapps’
directory. If a user supplies proper credentials, Sumo creates a session-specific Secure Shell connection to the host and a user-specific R session over that connection. Developers may write dynamic server pages that make use of the persistent R session and user-specific file space.

and for Apple fanboys-

We created the xgrid package (Horton and Anoke, 2012) to provide a simple interface to this distributed computing system. The package facilitates use of an Apple Xgrid for distributed processing of a simulation with many independent repetitions, by simplifying job submission (or grid stuffing) and collation of results. It provides a relatively thin but useful layer between R and Apple’s ‘xgrid’ shell command, where the user constructs input scripts to be run remotely. A similar set of routines, optimized for parallel estimation of JAGS (just another Gibbs sampler) models is available within the runjags package (Denwood, 2010). However, with the exception of runjags, none of the previously mentioned packages support parallel computation over an Apple Xgrid.

Hmm I guess parallel computing enabled by Wifi on mobile phones would be awesome too ! So would be anything using iOS . See the rest of the R Journal at


Patent Wars in Mobile Software

My latest article published in India Telecom Brief on the patent wars-


Patent Wars in Mobile Software

Why are Apple, Microsoft and Google spending billions to acquire patents? Recently Google, maker of the largest selling mobile operating system, Android decided to acquire Motorola Mobility for 12.5 billion dollars, giving it some 17000 patents with another 7500 patents pending.
Meanwhile some months ago, a consortium led by Microsoft, Apple and Research in Motion (maker of Blackberry) bought 6000 patents by Nortel Networks for 4.5 billion dollars.
These are only the defensive moves in these patent wars. In offensive moves, Microsoft has sued HTC, Barnes and Nobles, Motorola for patent infringement over them using Android operating system claiming some aspects are patented by it. Though Google does not earn any money directly from selling Android, ironically Microsoft is earning money from Android vendors including up to 5 dollars per handset from HTC.

Read the full article at



A brilliant infographic  from George Kokkinidis at Design Language sums all the absurdity up- where almost everyone is suing everyone. Truly a picture is worth a thousand words.