Hi Rosario,

It saying that because you could have not loaded that function in your R
session. It availbale at [1]. Go there, copy and paste it in your session.
You should be ready to go after doing this.

HTH,
Jorge

[1] http://egret.psychol.cam.ac.uk/statistics/R/graphs1.html


On Thu, Jun 3, 2010 at 11:33 AM, Rosario Garcia Gil <> wrote:

> 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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