Update SymbolicFunctionLearner.py

SymbolicFunctionLearner.py

@@ -1377,7 +1377,7 @@ class SFL:
         if y is not None:
             y = np.array(y)
         # ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-        y = np.zeros((1, 1, x.shape[0]))
+        y = np.zeros((x.shape[0], 1, 1))
 
         sample = np.random.choice(range(x.shape[0]), size=train_set_size, replace=False)
         train_x = x[sample][:]