bargraph.CI

hello,

I had a problem with the function "bargraph.CI". "bargraph.CI" draws a  
figure according to the alphabet sequence of the factor used. For  
example, I have a factor with for levels "CK", "N5", "N10", "N15", but  
the bars appear in "CK","N10","N15","N5" order(alphabet sequence), but  
I want the bars to appear  "CK", "N5", "N10", "N15"(treat level  
sequence). Do you have any ideas to realize the goal?

Thank you!


Yuanzhi