Index: trunk/SDToolBox/predictor_definition.py
===================================================================
diff -u -r216 -r217
--- trunk/SDToolBox/predictor_definition.py	(.../predictor_definition.py)	(revision 216)
+++ trunk/SDToolBox/predictor_definition.py	(.../predictor_definition.py)	(revision 217)
@@ -39,7 +39,8 @@
 
     @staticmethod
     def compute_spatial_gradients(data_array: xr.DataArray) -> xr.DataArray:
-        """Computes the spatial gradients.
+        """Computes the spatial gradients for a xarray with multiple variables.
+        Expected type: (variable, time, lat, lon)
 
         Arguments:
             data array {xr.DataArray} -- DataArray for