ggplot2's geom_errorbar legend

Hi Giovanni,
A reproducible example would help. Also, since I think this will be
tricky, it might be a good idea to post it to the ggplot2 mailing list
 (you can register at http://had.co.nz/ggplot2/ ).

Best,
Ista

Hello,

I create a simple ggplot that only shows a straight line. I then add three datasets of CI using the geom_errorbar function. The problem is that I can't find any way to have the legend showing up ... I need to show what each ?color of the CIs corresponds to i.e. which method.

Can anyone advice please?
TIA,
Best regards,
Giovanni

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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.

Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org

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Hi Giovanni,

The basic idea is:

classiclimits <- aes(x=x[1:100],ymax = classiccis[1:100,e,p,
 ymin=classiccis[1:100,e,p,2], colour = "classic")
ownlimits <- aes(x=x[1:100]+0.4,ymax = owncis[1:100,e,p,1],
  ymin=owncis[1:100,e,p,2], colour = "own")
rbootlimits <- aes(x=x[1:100]+0.8,ymax = rbootcis[1:100,e,p,1],
  ymin=rbootcis[1:100,e,p,2], colour = "rboot")

And then remove the explicit colours elsewhere in your code.

Hadley

Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/