> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Sarah Goslee > Sent: Tuesday, October 25, 2011 12:50 PM > To: Andrés Aragón > Cc: R-help@r-project.org > Subject: Re: [R] extract data for specific levels factor > > Hi, > > 2011/10/25 Andrés Aragón <armand...@gmail.com>: > > Dear all, > > > > I'm trying to analyze data with the following structure: > > > > ind cat tx age > > 40.2 por fol peq vh 35 > > 41.9 por fol med vh 35 > > 68.9 por fol preov vh 35 > > 71.5 por fol peq ser 37 > > 67.5 por fol med ser 37 > > 76.9 por fol preov ser 37 > > 78.7 por fol peq otr 37 > > 78.3 por fol med otr 37 > > 82.1 por fol preov otr 37 > > 83.9 por fol peq vh 37 > > 80.6 por fol med vh 37 > > 76.1 por fol preov vh 37 > > 86.9 por fol peq ser 35 > > 97.7 por fol med ser 35 > > 62.3 por fol preov ser 35 > > > > > > > > I want to separate exclusively some of factor levels (“por fol peq” > > in the “cat” colum). I am using ggplot2 and I only can plot all of > > factors, not separately. I did try ddply without success. > > Any help is welcome. > > This kind of question is *so* much easier to answer if you provide > reproducible data with dput(). This is untested because of lack of > data, but what about > > newdata <- origdata[origdata$cat %in% c("por", "fol", "peq"),] > > Depending on the effect you want, you may also wish to drop the > unused levels or reorder the levels using factor(). > > Sarah >
Or, if I have guessed correctly, something like this will work newdata<- origdata[origdata$cat == 'por fol peq',] Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
