[R] Drawing asymmetric error bars

[David L Carlson]

You can always roll your own with something like:

> x1 <- c(4, 5, 7)
> x2 <- c(5, 6, 9)
> plot(c(1.5, 2.5), cbind(x1[2], x2[2]), xlab="", ylab="", 
     xlim=c(1, 3), ylim=c(0, 10), xaxt="n")
> axis(1, at=1:2+.5, labels=c("Group 1", "Group 2"))
> arrows(1.5, x1[2], 1.5, c(x1[1], x1[3]), angle=90, length=1/8)
> arrows(2.5, x2[2], 2.5, c(x2[1], x2[3]), angle=90, length=1/8)

----------------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Alexandra Howe
> Sent: Thursday, September 27, 2012 5:59 AM
> To: r-help at r-project.org
> Subject: [R] Drawing asymmetric error bars
> 
> Hello,
> 
> I have data which I have arcsin transformed to analyse.
> I want to plot my data with error bars however as my data is
> back-transformed my standard errors are uneven.
> Is there a simple way to draw these asymmetric error bars in R?
> 
> Thanks for your help.
> 
> 	[[alternative HTML version deleted]]
> 
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