On Thu, 2006-08-03 at 14:44 -0400, Neil McLeod wrote: > Hi all, > > Is there any way to access a column of a data frame by its label (title) > rather than its column index? For example, I'd like to be able to select > animals[,"weight"] rather than animals[,3], if the third column of the > "animals" data frame has the label "weight". > > Thank you!
You answered your own question...animals[,"weight"] You can also do: animals$weight or animals[["weight"]] or subset(animals, select = weight) See ?Extract and ?subset for more information. HTH, Marc Schwartz ______________________________________________ [email protected] 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.
