On Fri, Jun 1, 2012 at 11:23 AM, Brigid Mooney <bkmoo...@gmail.com> wrote: > Hopefully this is an easy problem... > > I'm trying to add a partitioned rank column to a data frame where the > rank is calculated separately across a partition by categories, the > way you could easily do in SQL. I found this solution in the archives > that looked like it might work: > and provide commented, minimal, self-contained, reproducible code.
See the sqldf home page (http://sqldf.googlecode.com) and in particular this part: https://code.google.com/p/sqldf/#12._How_does_one_use_sqldf_with_PostgreSQL? -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.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.
