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Interview: Eigen Matrix Library 

What follows is an interview with Benoît Jacob and Gael Guennebaud, two developers of the open source Eigen project, which provides incredibly fast C++ matrix and vector numeric code. OK, let’s start out with the basics. Could you introduce yourselves? Benoit: I’m a Mathematics postdoc at the University of Toronto, coming from…

Mac How To

Compiling MPI with f90 support on Snow Leopard 

Good day friends, I am trying to compile the latest stable iteration of MPI, downloadable from, on my MacBook Pro that utilizes the Snow Leopard OS, 10.6.4. I have installed both gfortran and gcc, both obtained from When I compile the MPI program, it does not do so…


More iPhone apps for scientists 

This week, I noticed two noteworthy iPhone applications targeted at scientists, Grafly and  •Grafly (iTunes store link), a new graphing calculator that takes advantage of the accelerometer to provide a very interesting “gravity mode”, whereby you can move around a plot by moving the iPhone itself. And of course, the “touch mode” allows…

Mac How To

OpenCL Security Tutorials 

The OpenCL Tutorials: In iTunes, you can subscribe to the podcasts by going to: Advanced -> Subscribe to podcast URL: Episode 1 – Introduction to OpenCL Episode 2 – OpenCL Fundamentals Episode 3 – Building an OpenCL Project Episode 4 – Memory Layout and Access Episode 5 – Episode…

Mac How To

Tinkering with Google App Engine 

Google announced Google App Engine, their long-awaited answer to web services offered by Amazon and others. Google took a different approach to their competitors by including a full application stack for developers. This made App Engine less flexible, by forcing developers to use the programming tools and libraries that Google supplied, but it…


Contribute to OpenMacGrid 

Contributing your Mac’s idle processing power to the OpenMacGrid is very easy. However, before you do so, please make sure that your Mac has at least: 256 MB of Memory,1 GB of available hard disk space,G4 or better CPU andRunning Mac OS 10.4 (Tiger) or Mac OS 10.5 (Leopard). Simply…


GDL .. a free IDL 

Many among us, in the Mac scientific community, use IDL, a sophisticated data visualisation and analysis platform by ITT Visual Information Solutions (formerly, Research Systems Inc.). It is particularly popular in astronomy/astrophysics and also biophysics/medicine. IDL is commercial software and is amongst the most expensively licensed packages, I have ever used. There is…