Hi Hadley, thanks for your tip! It worked fine (though I had to use "tile" instead of "point"). I see your point to handle legends the way you do, which is a very convenient feature of ggplot. It's great for points, lines, bars etc., but in the particular case of error bars, I think it would be reasonable to omit them by default and only turn them on if someone really wants them (by using something like "legend=TRUE"). Just my two cents, for now, I'm happy with your workaround.
Thanks again, Carsten On Mon, 2008-06-16 at 09:49 -0500, hadley wickham wrote: > Hi Carsten, > > In my eagerness to get every component of the legend working > automatically, I've completed neglected a way to turn bits off of you > don't want them (the philosophy is that every geom that uses an > aesthetic should appear in the legend in some way). The best thing I > can suggest at the moment is: > > GeomErrorbar$guide_geom <- function(.) "point" > > to use points for the errorbar legend, which you won't see because > they'll overlap with the points from the points geom. In the next > version, you'll be able to do > > GeomLine$guide_geom <- function(.) "blank" > > Or I might come up with a better way of controlling the appearance. > > Regards, > > Hadley > > On Mon, Jun 16, 2008 at 2:55 AM, Carsten Jaeger <[EMAIL PROTECTED]> wrote: > > Dear list (probably Hadley), > > > > I'm trying to do a plot like the following, composed of bars and error > > bars: > > > > df <- data.frame(factor1=gl(2,5), factor2=gl(5,1), y=rnorm(10), > > err=0.1) > > ggplot(df, aes(x=factor1, y=y, fill=factor2)) + > > geom_bar(position="dodge", stat="identity") + > > geom_errorbar(aes(min=y-err, max=y+err), position="dodge", > > width=0.1) > > > > The plot obtained has a legend named "factor2", giving as expected the > > colours used for the five factor levels of factor2. So far so good. > > However, the legend also contains solid horizontal lines, obviously > > representing the error bars. While I do not immediately see the sense of > > a legend symbol for error bars, is there any easy way to turn these off? > > > > Thanks, > > Carsten > > > > ______________________________________________ > > 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.
