Has to be said I cheated a bit on the Coursera course, I used Ruby to clean up some of the data. Seemed a lot easier, and it's a lot more likely I'd use some ki

Has to be said I cheated a bit on the Coursera course, I used Ruby to clean up some of the data. Seemed a lot easier, and it's a lot more likely I'd use some kind of scripting language (be it Perl, Ruby, Grep, ...) to do a first clean up than head directly to R to do the job.