Summarize the Group Membership of a Spectra or Spectra2D Object
This function summarizes the group membership	 of
a Spectra or Spectra2D object.
sumGroups(spectra)
A data frame as follows. Note that if there are groups with no members these are dropped.
| group | The name of the group. | 
| no. | The number in the group. | 
| color | The color assigned to the group. | 
| symbol | The symbol assigned to the group.  | 
| alt.symbol | The alternative symbol assigned to the group.  | 
Bryan A. Hanson, DePauw University.
To summarize the entire object, sumSpectra.
if (checkForPackageWithVersion("ChemoSpec", "5.1")) {
  library("ChemoSpec")
  data(SrE.IR)
  sumGroups(SrE.IR)
}
if (checkForPackageWithVersion("ChemoSpec2D", "0.3")) {
  library("ChemoSpec2D")
  data(MUD1)
  sumGroups(MUD1)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.