R help - Mar 2010 - Lattice: barchart, error bars and grouped data

Hi,

How can I, given the code snippet below, draw the error bars in the center 
of each grouped bar rather than in the center of the group?

Thanks for any hints,

Joh

library(lattice)

barley[["SD"]] <- 5
barchart(
  yield ~ variety | site, 
  data = barley,
  groups=year,
  origin=0,
  lowDev=barley[["SD"]],
  highDev=barley[["SD"]],
  panel = function(
    x,
    y,
    ...,
    lowDev,
    highDev
  ){
    panel.barchart(x, y, ...)
    panel.segments(
       as.numeric(x),
       as.numeric(y) - lowDev,
       as.numeric(x),
       as.numeric(y) + highDev,
       col = 'red', lwd = 2,
       ...)
  }
)

Johannes wrote:
> 
> 
> How can I, given the code snippet below, draw the error bars in the center 
> of each grouped bar rather than in the center of the group?
> 
http://markmail.org/message/oljgimkav2qcdyre

Dieter

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Thanks. I switched to ggplot2 which offers error bars.

Joh

Dieter Menne wrote:
> 
> 
> Johannes wrote:
>> 
>> 
>> How can I, given the code snippet below, draw the error bars in the
>> center of each grouped bar rather than in the center of the group?
>> 
> 
> http://markmail.org/message/oljgimkav2qcdyre
> 
> Dieter
>