On May 10, 2006, at 4:02 PM, Guenther, Cameron wrote: > How can I use unique to extract the rows that have repeated tripid's > only, not a unique value for each variable but only for TRIPID. I > then > want to condense the unique values by summing the CONVUNIT for each > unique value of TRIPID.
Thanks, Cameron, for this question. This type of manipulation would be relatively simple to do in a RDBMS (e.g. MySQL, PostgreSQL, Oracle, etc.) But I'm curious to see how one would do the same in R. So, if folks send you solutions off-list, please do post them back to the list. Regards, - Robert http://www.cwelug.org/downloads Help others get OpenSource software. Distribute FLOSS for Windows, Linux, *BSD, and MacOS X with BitTorrent ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
