Add comment about python list initialization.

qimomo · May 19, 2014 · ab685fe · ab685fe
1 parent 869d656
commit ab685fe
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ocr/ocr.py b/ocr/ocr.py
@@ -70,7 +70,7 @@ def train(self, training_data_array):
             y2 = self.sigmoid(y2)
 
             # Step 3: Back propagation
-            actual_vals = [0] * 10
+            actual_vals = [0] * 10 # actual_vals is a python list for easy initialization and is later turned into an np matrix (2 lines down).
             actual_vals[data['label']] = 1
             output_errors = np.mat(actual_vals).T - np.mat(y2)
             hiddenErrors = np.multiply(np.dot(np.mat(self.theta2).T, output_errors), self.sigmoid_prime(sum1))