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[ccp4bb]: twinning detection

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Dear all,
	
	I suspected that my data is twinned and carried out the twinning detection 
using the input file detect_twinning.inp in CNS. I got the following 
result:
	
---------------------------averages-over-all-bins-----------------------------

   <|I|^2>/(<|I|>)^2 =    4.0639 (2.0   for untwinned, 1.5   for twinned)
  (<|F|>)^2/<|F|^2>  =    0.5682 (0.785 for untwinned, 0.865 for twinned)
------------------------------------------------------------------------------



Why the statistics of my data is so far away from the idea values for 
either twinned or untwinned data. Is my data twinned or not from this 
result?
	
Thanks in advance. 

Fan





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