Hi William, This is exactly what Im trying to do. Your a star,
Thanks On Wed, Apr 3, 2013 at 5:33 PM, William Dunlap <wdun...@tibco.com> wrote: > Are you trying to convert a column name like "Na_mgkg" to a plot label > like Na (mg kg^-1) ? > If so you will have to use both string manipulation functions like gsub() > and expression manipulating > functions like bquote(). E.g., > > f <- function (name) > { > # add other suffices and their corresponding plotmath expressions to > the list > env <- list2env(list(mgkg = bquote(mg ~ kg^{-1}), > ugkg = bquote(mu * g ~ kg^{-1})), > parent = emptyenv()) > pattern <- paste0("_(", paste(objects(env), collapse="|"), ")") > bquoteExpr <- parse(text=gsub(pattern, > "~(.(\\1))", > name))[[1]] > # I use do.call() to work around the fact that bquote's first argument > is not evaluated. > do.call(bquote, list(bquoteExpr, env)) > } > > d <- data.frame("Na_mgkg"=1:10, "K_ugkg"=10:1) > plot(Na_mgkg ~ K_ugkg, data=d, xlab=f("K_ugkg"), ylab=f("Na_mgkg")) > > Bill Dunlap > Spotfire, TIBCO Software > wdunlap tibco.com > > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf > > Of Shane Carey > > Sent: Wednesday, April 03, 2013 8:02 AM > > To: r-help@r-project.org > > Subject: [R] Superscript > > > > Hi, > > How do I write a superscript within gsub? > > > > I have the following: gsub("_mgkg",expression(paste("mg > kg"^{-1})),names[1]) > > > > Thanks > > > > > > > > -- > > Shane > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > 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. > -- Shane [[alternative HTML version deleted]] ______________________________________________ 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.