Try this also: input[targets]
On 08/02/2008, Allen S. Rout <[EMAIL PROTECTED]> wrote: > > Greetings. > > At the moment, I'm applying R to some AIX 'nmon' output, trying to get > a handle on some disk performance metrics. In case anyone's > interested: > > http://docs.osg.ufl.edu/tsm/pdf/ > > some of them are more edifying than others. (ahem) > > I'm trying to develop a somewhat general framework for plotting these > measures, in the hopes that it's of some use to people other than me. > One obstacle I encounter is that, when I select one column out of a > data.frame, the result is no longer a data.frame. So, say I've got, > in data frame 'input' > > disk1 disk2 disk3 disk4 > T0000 0 1 0 4 > T0001 0 1 0 5 > T0002 0 1 0 5 > T0003 0 2 0 4 > T0004 0 2 0 3 > T0005 0 1 0 3 > T0006 0 0 0 3 > > and somewhere I've noted a list > > targets <- c('disk2','disk3') > > I can say > > input[,targets] > disk2 disk3 > T0000 1 0 > T0001 1 0 > T0002 1 0 > T0003 2 0 > T0004 2 0 > T0005 1 0 > T0006 0 0 > > but if > > targets <- c('disk2') > input[,targets] > [1] 1 1 1 2 2 1 0 > > Ick. > > I've been reading through the indexing and data.frame docs, and remain > unsatisfied so far. Where is my thinking going wrong? > > > > - Allen S. Rout > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
