Method crossover

pattern/vector/__init__.py:2452–2455

Must be implemented in a subclass, returns a new candidate.

(self, candidate1, candidate2, d=0.5)

        return 1.0
    
    def crossover(self, candidate1, candidate2, d=0.5):
        """ Must be implemented in a subclass, returns a new candidate.
        """
        return None
        
    def mutate(self, candidate, d=0.1):
        """ Must be implemented in a subclass, returns a new candidate.