I don't know if mine is optimised or the best solution but I recently had reason to write ruby code for pearson and spearman correlation coefficients. I generally use spearman over pearson as it doesn't assume normality in the data.
http://github.com/michaelbarton/rustat/tree/master/lib/rustat/correlation.rb Cheers Mike On Dec 9, 2:58 pm, "Jim Neath" <[email protected]> wrote: > Hi Chaps, > > I recently bought Programming Collective Intelligence by Toby Segaran. > Awesome book. It's given me an idea for a small challenge. > > How would *you* go about coding Pearson's Correlation? I've got my own > solution but alas I fear that it's not as good or optimised as it > should/could be, so I'd find it interesting to see how others would do it. > > No deadline for the challenge. I just want to see how others go about it. > > Go Team! > > -- > Jim Neath - Manchester based Ruby on Rails Developerhttp://jimneath.org --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "NWRUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nwrug-members?hl=en -~----------~----~----~----~------~----~------~--~---
