On Wed, Apr 20, 2011 at 6:36 PM, Dennis Murphy <djmu...@gmail.com> wrote: > Hi: > > Perhaps you're looking for subset()? I'm not sure I understand the > problem completely, but is > > do.call(rbind, lapply(database, function(df) subset(df, Symbol == 'IBM'))) > > or > > library(plyr) > ldply(lapply(database, function(df) subset(df, Symbol == 'IBM'), rbind)
That's a bit redundant. All you need is: ldply(database, function(df) subset(df, Symbol == 'IBM')) Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.
