when producing boxplot from bwplot, I have five groups: Nitrogen, Duration,
Pressure, A, Z. I wish the graphical display is according to the original
order. But the R-function bwplot seems to automatically adjust the groups
according to the alphabetic oder and thus creat a graph for A, Duration,
Nitrogen, Pressure and Z. How can I specify the original order in bwplot?

This also happens to the older function boxplot.

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