Hi All,
 
 
I am trying to use xyplot to plot several lines in one panel with red
color  for a group of lines, say 3 lines and blue color for another
group of lines, say 4. I know this can be easily  done using regular
plot function. But i could not figure out how to do this in xyplot. 
 
 
Any help would be greatly appreciated. 
 
Xuesong 
 
 
                   


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