TP3: print perceptron errors.

[TP_AA.git] / TP3 / exo2 / tp3_exo2.py

diff --git a/TP3/exo2/tp3_exo2.py b/TP3/exo2/tp3_exo2.py
index e1c03dde8b616335b18aad4f442c64af8f5e1e68..b97c6ea4df6424608316272322dc3840da29428f 100755 (executable)
--- a/TP3/exo2/tp3_exo2.py
+++ b/TP3/exo2/tp3_exo2.py
@@ -74,10 +74,11 @@ def perceptron_nobias(X, Y):
     classification_error = 1
     while not classification_error == 0:
         classification_error = 0
-        for i in range(X.shape[0]):
-            if Y[i] * np.dot(w, X[i]) <= 0:
+        for x, y in zip(X, Y):
+            if y * np.dot(w, x) <= 0:
                 classification_error += 1
-                w = w + Y[i] * X[i]
+                w = w + y * x
+        print(classification_error)
     return w
 
 
@@ -102,7 +103,7 @@ def apply_plongement(sample, p):
 def f_from_k(coeffs, support_set, k, x):
     output = 0
     for c, s in zip(coeffs, support_set):
-        output += c * s[0] * k(s[1], x)
+        output += c * s[1] * k(s[0], x)
     return output
 
 
@@ -122,29 +123,38 @@ def perceptron_k(X, Y, k):
     classification_error = 1
     while not classification_error == 0:
         classification_error = 0
-        for i in range(X.shape[0]):
-            if Y[i] * f_from_k(coeffs, support_set, k, X[i]) <= 0:
+        for x, y in zip(X, Y):
+            if y * f_from_k(coeffs, support_set, k, x) <= 0:
+                if x not in support_set:
+                    support_set.append((x, y))
+                    coeffs.append(1)
+                else:
+                    coeffs[support_set.index((x, y))] += 1
                 classification_error += 1
-                support_set.append([Y[i], X[i]])
-                coeffs.append(1)
-            else:
-                coeffs[len(coeffs) - 1] = coeffs[len(coeffs) - 1] + 1
-    return coeffs, support_set
+        print(classification_error)
+    return np.array(coeffs), np.array(support_set)
 
 
-def f(x, y, w):
-    return
+def f(w, x, y):
+    return w[0] + w[1] * x + w[2] * y + w[3] * x**2 + w[4] * x * y + w[5] * y**2
 
 
+pl.scatter(X[:, 0], X[:, 1], c=Y, s=training_set_size)
+pl.title(u"Perceptron - hyperplan")
+
 coeffs, support_set = perceptron_k(X, Y, k1)
 # coeffs, support_set = perceptron_k(X, Y, kg)
-print(coeffs)
-print(support_set)
+res = training_set_size
+for x in range(res):
+    for y in range(res):
+        if abs(f_from_k(coeffs, support_set, k1, [-3 / 2 + 3 * x / res, -3 / 2 + 3 * y / res])) < 0.01:
+            pl.plot(-3 / 2 + 3 * x / res, -3 / 2 + 3 * y / res, 'xr')
+
+# X = apply_plongement(X, plongement_phi)
+# w = perceptron_nobias(X, Y)
+# for x in range(res):
+#     for y in range(res):
+#         if abs(f(w, -3 / 2 + 3 * x / res, -3 / 2 + 3 * y / res)) < 0.01:
+#             pl.plot(-3 / 2 + 3 * x / res, -3 / 2 + 3 * y / res, 'xb')
 
-X = apply_plongement(X, plongement_phi)
-w = perceptron_nobias(X, Y)
-print(w)
-
-pl.scatter(X[:, 0], X[:, 1], c=Y, s=training_set_size)
-pl.title(u"Perceptron - hyperplan")
 pl.show()