500+ hours. http://www.whitemagicsoftware.com/software/climate/guru.shtml http://www.whitemagicsoftware.com/software/climate/guru.shtm... *Lessons learned: R

500+ hours. http://www.whitemagicsoftware.com/software/climate/guru.shtml http://www.whitemagicsoftware.com/software/climate/guru.shtm... *Lessons learned: R is a phenomenal language for statistical analysis. Do not underestimate the power of StackOverflow to help solve complex problems. The PostgreSQL database has superb language support. Integrating third-party data sources takes longer than you think; inserting 270 million records into a database takes a lot of preparation to execute correctly.