Description Usage Arguments Value Author(s) References See Also
Callers of PLOTR may wish to group on more than one index.  This function combines
those indices into text for a single index vector.
| 1 | groupnames(data, grp, grpnames = NULL, run)
 | 
| data | data.frame in which to find the groups | 
| grp | columns by which to group | 
| grpnames | optional substitute names | 
| run | run name | 
factor
Tim Bergsma
http://metrumrg.googlecode.com
PLOTR
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