diff --git a/examples/003_datageneration/001_own_datagenerator.py b/examples/003_datageneration/001_own_datagenerator.py
index 0a004427..fbba3a08 100644
--- a/examples/003_datageneration/001_own_datagenerator.py
+++ b/examples/003_datageneration/001_own_datagenerator.py
@@ -114,7 +114,9 @@ def y(x):
 #
 # In order to create an :class:`~f3dasm.ExperimentData` object, we have to first create a domain
 domain = Domain()
-domain.add_float('x', low=0., high=100.)
+domain.add_float(name='x', low=0., high=100.)
+
+# Note that the number of input variable ant its name match the function :func:`y(x)`.
 
 ###############################################################################
 # For demonstration purposes, we will generate a dataset of stopping distances for velocities between 3 and 83 m/s.
diff --git a/src/f3dasm/_src/experimentdata/experimentdata.py b/src/f3dasm/_src/experimentdata/experimentdata.py
index f053fdc5..ec883163 100644
--- a/src/f3dasm/_src/experimentdata/experimentdata.py
+++ b/src/f3dasm/_src/experimentdata/experimentdata.py
@@ -1106,7 +1106,7 @@ def mark_all_nan_open(self) -> None:
     #                                                            Datageneration
     # =========================================================================
 
-    def evaluate(self, data_generator: DataGenerator,
+    def evaluate(self, data_generator: DataGenerator | Callable,
                  mode: Literal['sequential', 'parallel',
                                'cluster', 'cluster_parallel'] = 'sequential',
                  kwargs: Optional[dict] = None,
@@ -1116,7 +1116,9 @@ def evaluate(self, data_generator: DataGenerator,
         Parameters
         ----------
         data_generator : DataGenerator
-            data generator to use
+            Data generator to use. If a function is provided, it will be converted to
+            a data generator and its signature should match the experimental data input
+            names.
         mode : str, optional
             operational mode, by default 'sequential'. Choose between: