Hi All,

For the following data when I use xyplot in package lattice the intervals are in the order of 2, 24, 8, but instead I want them to be in the order 2, 8, 24.

  Treatment Interval  value
  A          2  		0.448
  A	       24		1.85
  A          8  		1.166
  B          2  		1.074
  B	       24		1.5
  B          8  		1.065
  C  	       2  		0.854
  C          8  		0.589

The R script is xyplot(value ~ Interval, data=studyData, type='b', groups = Treatment,

Is there a way in xyplot to specify the order?. 

-Sandeep

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