trained regression model evaluation

lib/tasks/stats.rake

@@ -65,7 +65,7 @@ namespace :stats do
 
     # Save each regression model to the database
     regressions.each do |name, result|
-      normalizer = result.equation.normalizer
+      equation = result.equation
       model_name = "fa_fav_id_and_date_#{name.downcase}"
       TrainedRegressionModel.find_by(name: model_name)&.destroy
       TrainedRegressionModel.create!(
@@ -78,17 +78,17 @@ namespace :stats do
         train_test_split_ratio: 0.8, # hardcoded, see split_train_test default
         random_seed: 42, # hardcoded, see split_train_test
         max_points_limit: max_points,
-        x_min: normalizer.x.min,
-        x_max: normalizer.x.max,
-        y_min: normalizer.y.min,
-        y_max: normalizer.y.max,
-        coefficients: result.equation.coefficients,
+        x_min: equation.x.min,
+        x_max: equation.x.max,
+        y_min: equation.y.min,
+        y_max: equation.y.max,
+        coefficients: equation.coefficients,
         training_r_squared: result.training_r_squared,
         evaluation_r_squared: result.evaluation_r_squared,
         equation_string: result.equation_string,
         metadata: {
-          x_range: normalizer.x_range,
-          y_range: normalizer.y_range,
+          x_range: equation.x.range,
+          y_range: equation.y.range,
         },
       )
       puts "💾 Saved #{name} regression model to DB."