Ray, your solution works and is indeed faster than mine! It looks like it's going to take a few days to to 400,000 rows, still, which is unfortunate.
Steve, thanks for your help, I'll definitely self-teach plyr and data.table. ----- ---- Isaac Research Assistant Quantitative Finance Faculty, UTS -- View this message in context: http://r.789695.n4.nabble.com/How-to-make-this-for-loop-memory-efficient-tp4283594p4284716.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
