veh type expressions cleanup

Author: dhensle

ext-configs/vehicle_type_choice_annotate_alts_preprocessor.csv

@@ -1,3 +1,7 @@
 Description,Target,Expression
-mapping fuel type to integers,fuel_type_num_coded,"df.fuel_type.map({'BEV': 1, 'Diesel': 2, 'Gas': 3, 'Hybrid': 4, 'PEV': 5})"
-mapping body type to integers,body_type_num_coded,"df.body_type.map({'Car': 1, 'Motorcycle': 2, 'Pickup': 3, 'SUV': 4, 'Van': 5})"
+mapping fuel type to integers,fuel_type_num_coded,"df.fuel_type.map({'BEV': 1, 'Diesel': 2, 'Gas': 3, 'Hybrid': 4, 'PEV': 5}).astype(int)"
+mapping body type to integers,body_type_num_coded,"df.body_type.map({'Car': 1, 'Motorcycle': 2, 'Pickup': 3, 'SUV': 4, 'Van': 5}).astype(int)"
+# moving log terms to preprocessor to avoid expensive log calculations,,
+log number of models available,logged_models,"np.log(1 + df.NumModels)"
+log number of makes available,logged_makes,"np.log(1 + df.NumMakes)"
+logged chargers per capita,logged_chargers_per_capita,"np.log(1 + CHARGERS_PER_CAP)"