The code to use would be something like

limits <- aes(ymax = y + se, ymin = y - se) # set error bar dimensions

ggplot(yourdataframe, aes(x = x, y = y, colour = z)) +
geom_point() +
geom_errorbar(limits)



On Tuesday, March 8, 2011 at 9:34 AM, Sascha Vieweg wrote: 
> Hello
> 
> Currently, I plot some coefficients with some intervals using 
> function "plotCI()" (package "gplots") using the following code:
> 
> (m1 <- matrix(0:5, nrow=2, byrow=T, dimnames=list(c("v1", "v2"),
>  c("lo", "m", "hi"))))
> m2 <- m1 + 1
> library(gplots)
> plotCI(
>  x=1:length(m1[, 1]),
>  pch="",
>  xlab="v1/v2",
>  xlim=c(1-.2, length(m1[, 1])+.2),
>  ylim=c(-.1, 7.1), yaxp=c(0, 7, 7),
>  ylab="Coefficients and intervals",
>  xaxt="n"
> )
> plotCI(
>  x=1:length(m1[, 1])-.1, y=m1[, 2], li=m1[, 1], ui=m1[, 3],
>  pt.bg="white", cex=1, lty=1, type="o", gap=0,
>  add=T
> )
> plotCI(
>  x=1:length(m2[, 1])+.1, y=m2[, 2], li=m2[, 1], ui=m2[, 3],
>  pch=10, pt.bg="white", cex=1, lty=1, type="o", gap=0,
>  add=T
> )
> axis(1, at=1:length(m1[, 1]), labels=NA)
> text(1:length(m1[, 1]), -.2, c("v1", "v2"), cex=1, xpd=T,
>  adj=.5, srt=0)
> abline(h=seq(0, 7, 1), col=gray(.7), lty="dotted", lwd=.85)
> legend(1.9, 7.1,
>  legend=c(".7", ".5"),
>  title="Condition:",
>  cex=.8
> )
> 
> I like to produce this plot with package "ggplot2", but I have 
> just discovered it and don't know where to start. It would be 
> great if somebody could give me a starting point with code for 
> that particular task.
> 
> Thanks, *S*
> 
> -- 
> Sascha Vieweg, saschaview@gmail.com
> 
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 

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