Ошибка утверждения нечеткого системного питона при вводе

Question

Я построил нечеткую систему управления, которая принимает три входа (x,y,z), которые принимают (плохие, средние или хорошие) значения и возвращают один выход (w) с (низким, средним или высоким) значением. к сожалению, когда я тестирую систему, я получаю ошибку подтверждения без какой-либо дополнительной информации. код, использованный для построения системы, показан ниже.

import numpy as np
import skfuzzy as fuzz
from skfuzzy import control as ctrl
import matplotlib.pyplot as plt
from matplotlib import rc
x=ctrl.Antecedent(np.arange(0,1,0.001), 'x')
y=ctrl.Antecedent(np.arange(0,1,0.001), 'y')
z=ctrl.Antecedent(np.arange(0,1,0.001), 'y')
w=ctrl.Consequent(np.arange(0,1,0.1),'w')
x.automf(3)
y.automf(5)
z.automf(7)
w['low'] = fuzz.trimf(w.universe, [0, 0, 0.3])
w['average'] = fuzz.trimf(w.universe, [0.25, 0.5, 0.75])
w['high'] = fuzz.trimf(w.universe, [0.7, 1, 1])
rule1 = ctrl.Rule(x['poor'] & y['poor'] & z['poor'], w['low'])
rule2 = ctrl.Rule(x['poor'] & y['poor'] & z['good'], w['low'])
rule3 = ctrl.Rule(x['poor'] & y['good'] & z['poor'], w['high'])
rule4 = ctrl.Rule(x['poor'] & y['good'] & z['good'], w['average'])
rule5 = ctrl.Rule(x['good'] & y['poor'] & z['poor'], w['low'])
rule6 = ctrl.Rule(x['good'] & y['poor'] & z['good'], w['low'])
rule7 = ctrl.Rule(x['good'] & y['good'] & z['poor'], w['average'])
rule8 = ctrl.Rule(x['good'] & y['good'] & z['good'], w['low'])
w_ctrl = ctrl.ControlSystem([rule1, rule2, rule3, rule4, rule5, rule6, rule7, rule8])
wResults= ctrl.ControlSystemSimulation(w_ctrl)
wResults.input['x'] = 0.03
wResults.input['y'] = 0.7
wResults.input['z'] = 0.01
wResults.compute() 

и ошибка, которую я получаю:

AssertionError                            Traceback (most recent call last)
<ipython-input-162-4519156d7582> in <module>()
     25 wResults= ctrl.ControlSystemSimulation(w_ctrl)
     26 wResults.input['x'] = 0.03
---> 27 wResults.input['y'] = 0.7
     28 wResults.input['z'] = 0.01
     29 wResults.compute()

C:\Users\user01\Anaconda3\lib\site-packages\skfuzzy\control\controlsystem.py in __setitem__(self, key, value)
    129         if len(matches) == 0:
    130             raise ValueError("Unexpected input: " + key)
--> 131         assert len(matches) == 1
    132         var = matches[0]
    133 

AssertionError: 

Интересно, есть ли у кого-нибудь идея, где этот код пошёл не так?

Answer 1

Первая проблема - опечатка,

z = ctrl.Antecedent(np.arange(0,1,0.001), 'y')    # should be 'z'!

Теперь код при запуске возвращает

ValueError: Crisp output cannot be calculated, likely because the system is too sparse.
 Check to make sure this set of input values will activate at least one connected Term
 in each Antecedent via the current set of Rules.

... так как

wResults.input['y'] = 0.7     # classifies as "decent",
                              # and you haven't given any relevant rules