membership_tests_scratch

import numpy as np
import skfuzzy as fuzz
import matplotlib.pyplot as plt
import ipdb

def trimf(x, abc):
    a, b, c = abc
    y = np.zeros(len(x))
    left_side_eq = (1/(b-a))*(x-a)
    right_side_eq = (1/(c-b))*(-x+c)
    y = np.minimum(left_side_eq,right_side_eq)
    y = np.maximum(y,0)
    return y

def trapmf(x,abcd):
    a, b, c, d = abcd
    left_side_eq = (1/(b-a))*(x-a)
    right_side_eq = (1/(d-c))*(-x+d)
    y = np.minimum(left_side_eq,right_side_eq)
    y = np.maximum(y,0)
    y = np.minimum(y,1)
    return y


x = np.linspace(0,10,110)
mfx = trimf(x, [0, 5, 10])
plt.plot(x,mfx)
plt.show()

mfx = trapmf(x, [0, 3, 7 , 10])
plt.plot(x,mfx)
plt.show()