[R] bargraph.CI change se for sd

[herwig]

Hi there, 
I am a beginner.
I would like to change the error bars in the bargraph.CI function from the
default (se) to (sd). The help file says
ci.fun= function(x) c(fun(x)-se(x), fun(x)+se(x))
Is there a simple way of telling the function what (x) precisely is - I
already define in in the  of the bargraph.CI function and assume that is
should be able to use that information.

cheers,
Herwig
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