This may be a bug in objects of class "instantiatedProtoMethod". I tried it with the devel version of proto and got no error so you could try that. I will send it to you offline for your try.
On Thu, Oct 8, 2009 at 1:02 PM, baptiste auguie <baptiste.aug...@googlemail.com> wrote: > Dear all, > > In mucking around with ggplot2, I've hit the following snag, > > library(ggplot2) > > # this returns a grob, OK > GeomAbline$icon() > # lines[GRID.lines.9] > > # this returns the function icon, OK > GeomAbline$icon > # proto method (instantiated with ): function (.) > # linesGrob(c(0, 1), c(0.2, 0.8)) > # <environment: 0x13e6800> > > Now I want to wrap this in a function, > > getIcon <- function(geom){ > st <- paste("Geom", firstUpper(geom), sep="") > > g <- get(st, 2) > > g$icon() > } > > getIcon("abline") # still OK > # lines[GRID.lines.10] > > but ... > > getIcon <- function(geom){ > st <- paste("Geom", firstUpper(geom), sep="") > > g <- get(st, 2) > > g$icon > } > getIcon("abline") > # proto method (instantiated with ): > # Error in get("icon", env = g, inherits = TRUE) : object 'g' not found > > So, it seems that I'm being too naive about using get on a proto > object or something along those lines. > > I'd be grateful if proto experts could help me extract the icon > function from this object. > > Best regards, > > baptiste > > ______________________________________________ > 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. > ______________________________________________ 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.