From d773729e6aae0626d25acf21b60d9d3d2f8cda2c Mon Sep 17 00:00:00 2001
From: Marco Raber <marco.raber@tutanota.com>
Date: Wed, 26 Jan 2022 11:58:38 +0100
Subject: [PATCH] Pushing to remote Perceptron.py, working as a buffer

---
 Perceptron.py | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100755 Perceptron.py

diff --git a/Perceptron.py b/Perceptron.py
new file mode 100755
index 0000000..e3121d5
--- /dev/null
+++ b/Perceptron.py
@@ -0,0 +1,86 @@
+#!/bin/python3
+import numpy as np
+import random
+
+cicli = 59990
+hidden_layer = 1
+epsilon = 0.01
+
+def fdt(x,deriv=False):
+    if(deriv==True):
+        return (1-np.tanh(x)**2)
+
+    return np.tanh(x)
+
+def error_func(output):
+    e=0
+    for i in range(len(output)):
+        e += (output[i]-Y[i])**2
+    return 0.5*e
+
+#input data
+X = np.array([[0,1],  # primo input
+            [0,1],
+            [1,1],
+            [1,1]])
+
+#output data
+Y = np.array([[0],
+             [0],
+             [1],
+             [1]])
+
+np.random.seed(1) #per avere sempre lo stesso
+
+#sinapsi tra input e Perceptron di output
+syn0 = 0.1*(2*np.random.random((2,hidden_layer)) -1)
+
+#print(syn0) #2x1
+
+# fase forward
+l0 = X
+l1 = fdt(np.dot(l0,syn0)) #output layer hidden, 4x4 4 esempi, 4 neuroni di output
+
+for i in range(cicli):
+    print(str(int(100*i/cicli))+"---------------------------------------") #% sul numero totale di cicli
+    # fase forward
+
+    old_error = error_func(l1)
+
+    #fase backward
+    #calcolo delta_nu
+    delta_nu = Y - l1
+
+    #print(syn0[:,0])
+    sum = 0
+    for nu in range(len(X)): #ciclo tra gli esempi
+        sum += epsilon*(delta_nu[nu]*fdt(np.dot(X[nu],syn0),True))*X[nu]
+        #print(sum)
+    syn0[:,0] += sum
+
+    l1 = fdt(np.dot(l0,syn0)) #output layer hidden, 4x4 4 esempi, 4 neuroni di output
+
+    current_error = error_func(l1)
+    print(old_error - current_error)
+
+    if (np.linalg.norm(sum) < 10**-8):
+        print("Very low variation in weight-space - exiting")
+        print("delta_w :"+str(np.linalg.norm(sum)))
+        break
+    if (error_func(l1) < 0.001):
+        print("Very low error - exiting")
+        break
+    if (abs(current_error - old_error) < 10**-8):
+        print("Very low error variation - exiting")
+        break
+
+
+print("Error: "+str(error_func(l1)))
+for i in range(len(np.transpose(l1))):
+    print(np.transpose(l1)[i])
+#for i in range(cicli):
+#l1 = fdt(np.dot(l0, syn0))
+#print(l1)
+#l2 = fdt(np.dot(l1, syn1))
+#print(l2)
+