Force the inclusion of (0,0) in the parameter grid

regularization.py

@@ -329,6 +329,13 @@ class Regularization:
         # build grid in parameter space
         w1 = np.linspace(w1_range[0], w1_range[1], num_dots)
         w2 = np.linspace(w2_range[0], w2_range[1], num_dots)
+
+        # include (0, 0)
+        if 0 not in w1:
+            w1 = np.insert(w1, np.searchsorted(w1, 0), 0)
+        if 0 not in w2:
+            w2 = np.insert(w2, np.searchsorted(w2, 0), 0)
+
         W1, W2 = np.meshgrid(w1, w2)
 
         return W1, W2