done did it again

03_euler_gen_alg.py

@@ -1,14 +1,23 @@
+"""
+Schreibe einen genetischen Algorithmus, der die Parameter
+(a,b,c,d) der Funktion f (x ) = ax 3 + bx 2 + cx + d so optimiert,
+dass damit die Funktion g(x ) = e x im Bereich [-1..1] möglichst
+gut angenähert wird. Nutze dazu den quadratischen Fehler (oder
+alternativ die Fläche zwischen der e-Funktion und dem Polynom).
+Zeichne die Lösung und vergleiche die Koeffizienten mit denen der
+Taylor-Reihe um 0.
+"""
+
 import numpy as np
 import random
 import struct
+import time
 # import matplotlib.pyplot as plt
 
-def generate_random_individuals():
-    pop_grey = format(random.getrandbits(32), '32b')
+def generate_random_population():
+    pop_grey = [format(random.getrandbits(32), '32b') for i in range(10)]
     pop_bin = grey_to_bin(pop_grey)
     a, b, c, d = pop_bin[0:7], pop_bin[8:15], pop_bin[16:23], pop_bin[24:31]
-    # val = int(b, 2) / 25.5 * 10 # conversion to 0.0 - 10.0 float
-
 
     return [a, b, c, d]
 
@@ -29,17 +38,17 @@ def bin_to_grey(binary):
 
 def bin_to_param(binary, q_min = 0.0, q_max = 10.0):
     """Convert binary string to float parameter in range [q_min, q_max]"""
-    # Convert binary string to integer
-    val = int(binary, 2)
+    val = int(binary, 2) / 25.5 * 10 # conversion to 0.0 - 10.0 float
     # Scale to range [q_min, q_max]
     q = q_min + ((q_max - q_min) / (2**len(binary))) * val
+    
     return q
 
 
 def quadratic_error(original_fn, approx_fn, n):
     error = 0.0
     
-    for i in range(n):
+    for i in range(-(n // 2), (n // 2) + 1):
         error += (original_fn(i) - approx_fn(i))**2
         
     return error
@@ -48,18 +57,20 @@ def e_fn_approx(a, b, c, d, x = 1):
     return a*x**3 + b*x**2 + c*x + d
 
 def fuck_that_shit_up():
-    bin_values = generate_random_individuals()
-    # Convert all binary strings to parameters in range 0.0-10.0
-    float_values = [bin_to_param(bin) for bin in bin_values]
-    a, b, c, d = float_values
+    bin_values = generate_random_population()
+    # Convert binary string to parameters for bin_values
+    a, b, c, d = [bin_to_param(bin) for bin in bin_values]
     
     e_func = lambda x: np.e**x
     fixed_approx = lambda x: e_fn_approx(a, b, c, d, x)
+    fitness = quadratic_error(e_func, fixed_approx, 6)
     
-    while quadratic_error(e_func, fixed_approx, 6) > 0.01:
+    while fitness > 0.01:
+        # calc fitness
+        fitness = quadratic_error(e_func, fixed_approx, 6)
+        print(fitness)
+        time.sleep(1)
         
-        pass
-        # berechne fitness
         # selection
         # crossover
         # mutation
@@ -67,6 +78,6 @@ def fuck_that_shit_up():
     # neue population
     return 0
 
-b = format(random.getrandbits(32), '32b')
-print(b)
+fuck_that_shit_up()
+# b = format(random.getrandbits(32), '32b')
 # print(quadratic_error(e_func, fixed_approx, 6)) # hopefully works