isreal

  ISREAL method overloaded for adcarray objects

  The builtin ISREAL returns false for adcarray objects. As this is called
  by some Mathworks supplied functions it can be a nuisance.
  This routine fixes the problem by returning true - adcarrays are always 
  real valued

  Author: Malcolm Lidierth 02/07
  Copyright © The Author & King's College London 2007