Added parameter documentation to 'build_training_data().'

DG_Approximation.py

@@ -305,6 +305,15 @@ class DGScheme(object):
 
         Initializes projection and calculates cell averages and reconstructions for it.
 
+        Parameters
+        ----------
+        adjustment : float
+            Extent of adjustment of each evaluation point in x-direction.
+        stencil_length : int
+            Size of training data array.
+        initial_condition : InitialCondition object, optional
+            Initial condition used for calculation. Default: None (i.e. instance variable).
+
         Returns
         -------
         np.array