normGeomSelect:

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   NormGeomSelect is a ranking selection function based on the normalized
   geometric distribution. 

   Since version 7.
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   Form:
   [newPop] = normGeomSelect(oldPop,options, seed)
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   Inputs
   ------  
   oldpop    the current population
   options   options to normGeomSelect [gen probability_of_selecting_best]
   seed      optional seed for random numbers, for testing

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   Outputs
   -------
   newPop    the new population selected from the oldPop

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