Thanks for the note. I've not really looked into how one would do that with R (doing it in Python seems more clear), but am checking it out now. If anyone else

Thanks for the note. I've not really looked into how one would do that with R (doing it in Python seems more clear), but am checking it out now. If anyone else is looking I'm finding this PDF helpful: http://biostat.mc.vanderbilt.edu/wiki/pub/Main/SvetlanaEdenRFiles/regExprTalk.pdf http://biostat.mc.vanderbilt.edu/wiki/pub/Main/SvetlanaEdenR...