> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Christof Kluß > Sent: Thursday, January 05, 2012 8:04 AM > Cc: r-h...@stat.math.ethz.ch > Subject: Re: [R] selection part of "subset" > > Hi > > the output should look like r <- subset(tab, a==v) > but now I have something like r <- subset(tab, "a"==v) > and r <- subset(tab, [["a"]]==v) > does not work :( > > greetings > Christof > > Am 05-01-2012 16:51, schrieb Christof Kluß: > > Hi > > > > I want to do something like > > > > a <- c(10,20,15,43,76,41,25,46) > > tab <- data.frame(a) > > > > name <- "a" > > > > for (v in unique(tab[[name]])) { > > r <- subset(tab, name==v) # this does not work > > ... > > } > > > > i.e. a "string" on the left side of the select expression (subset). > How > > could I solve this?
Christof, Maybe you could look at ?get. However, even using get(), you code probably won't work. get(name) will return a vector, and v in your example is a scalar. What is the task you are trying to accomplish? 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.
