[R] Order of bars w geom_errorbarh ??

[Judson Blake]

Using geom_errorbarh with ggplot, my plot has several error bars.   For my
presentation, the order of these bars from top to bottom is important.
But errorbarh seems to put these in a random order I can't change.  ( It
does not follow the order in the data.frame. )    How can I specify the
order of the bars?   Could I also specify the thickness of the bar lines?

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