It looks like superpose.eb is someone's function and not in a package.
https://stat.ethz.ch/pipermail/r-help/2002-November/027299.html
--- On Thu, 6/3/10, Rosario Garcia Gil <m.rosario.gar...@genfys.slu.se> wrote:
> From: Rosario Garcia Gil <m.rosario.gar...@genfys.slu.se>
> Subject: [R] (no subject)
> To: "r-help@r-project.org" <r-help@r-project.org>
> Received: Thursday, June 3, 2010, 11:33 AM
> Dear R users,
>
> I am trying to draw error bars in a bar plot, I use this
> code (tried many others which did not work):
>
> install.packages()
> library(gplots)
> y <-c(39.02, 46.42)
> se <- c(7.57,7.35)
> plot <- barplot(y, beside=TRUE, col=0, ylim=c(0,47),
> axis.lty=1, main="far-red", xlab="latitude",
> names.arg=c("56N", "68N"))
> superpose.eb(plot, y, se, col="orange", lwd=2)
>
> Then I get an error saying that it cannot find the
> superpose.eb function.
>
> Why? Isn´t under gplots?
>
> Thanks
> Rosario
>
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