Make sure data is sorted, sort is now per default False

Author: birgits

windpowerlib/power_curves.py

@@ -257,6 +257,7 @@ def wake_losses_to_power_curve(
                 wind_farm_efficiency.set_index("wind_speed"),
             ],
             axis=1,
+            sort=True,
         )
         # Add column with reduced power (nan values of efficiency are
         # interpolated)

windpowerlib/wind_farm.py

@@ -446,6 +446,7 @@ def assign_power_curve(
                     ),
                 ],
                 axis=1,
+                sort=True,
             )
         # Aggregate all power curves
         wind_farm_power_curve = pd.DataFrame(

windpowerlib/wind_turbine_cluster.py

@@ -211,6 +211,7 @@ def assign_power_curve(
                 )
             ],
             axis=1,
+            sort=True
         )
         # Sum up power curves
         cluster_power_curve = pd.DataFrame(