On Fri, 2006-01-20 at 18:55 +0100, Michael Reinecke wrote: > Hi! I suspect there must be an easy way to access components of a data > frame by name, i.e. the input should look like "name1 name2 name3 ..." > and the output be a data frame of those components with the > corresponding names. I ve been trying for hours, but only found the > long way to do it (which is not feasible, since I have lots of > components to select):
> dframe[names(dframe)=="name1" | dframe=="name2" | dframe=="name3"] > Do you know a shortcut? > Michael See ?subset: subset(dframe, select = c(name1, name2, name3)) Alternatively, if the number of columns to remove is less than the number of columns to select, you can precede the column names with a "-" as per standard indexing conventions. See the Details section and the examples in ?subset. 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
