sub

 SUB N1 N2 N3 N4 N5 -- Subtracts sets of spectra 

 Parameters: 
     
  N1  -- Start slot of first group
  N2  -- End slot of first group
  N3  -- Start slot of group to subtract from first set
  N4  -- End slot of group to subtract from first set
  N5  -- First slot for results 

 If N3=N4 then the same spectrum will be subtracted from all of the spectra 
 N1 to N2. Header taken from N1 to N2 group. Selection criteria apply. 

This command belongs to the classes: arithematic .