def oppositeFunction(basef):
""" the opposite of a function """
if isinstance(basef, FitnessEvaluator):
if isinstance(basef, FunctionEnvironment):
''' added by JPQ '''
if isinstance(basef, MultiObjectiveFunction):
res = MultiObjectiveFunction()
else:
# ---
res = FunctionEnvironment(basef.xdim, basef.xopt)
else:
res = FitnessEvaluator()
res.f = lambda x: -basef.f(x)
if not basef.desiredValue is None:
res.desiredValue = -basef.desiredValue
res.toBeMinimized = not basef.toBeMinimized
return res
else:
return lambda x: -basef(x)
