code: def getScales(self,term_i=None):
          
          if term_i==None:
              RV = self.vd.getScales()
          else:
              assert term_i<self.n_terms, 'Term index non valid'
              RV = self.vd.getScales(term_i)
          return RV
docs: Returns the Parameters
          
          Args:
              term_i:     index of the term we are interested in
                          if term_i==None returns the whole vector of parameters