Return active learning proposed placements with raw coordinate names

deepsensor/active_learning/algorithms.py

@@ -505,7 +505,7 @@ def __call__(
         self._init_acquisition_fn_ds(self.X_s)
 
         # Dataframe for storing proposed context locations
-        self.X_new_df = pd.DataFrame(columns=["x1", "x2"])
+        self.X_new_df = pd.DataFrame(columns=[self.x1_name, self.x2_name])
         self.X_new_df.index.name = "iteration"
 
         # List to track indexes into original search grid of chosen sensor locations

tests/test_active_learning.py

@@ -181,6 +181,27 @@ def test_greedy_alg_with_sequential_acquisition_fn(self):
         task = self.task_loader("2014-12-31", context_sampling=10)
         _ = alg(acquisition_fn, task)
 
+    def test_greedy_algorithm_column_names(self):
+        # Setup
+        acquisition_fn = Stddev(self.model)
+        X_s = self.ds_raw
+        alg = GreedyAlgorithm(
+            model=self.model,
+            X_t=X_s,
+            X_s=X_s,
+            N_new_context=1,
+            task_loader=self.task_loader,
+        )
+        task = self.task_loader("2014-12-31", context_sampling=10)
+
+        # Exercise
+        X_new_df, acquisition_fn_ds = alg(acquisition_fn, task)
+
+        # Assert
+        expected_columns = ['lat', 'lon']  # Replace with actual expected column names
+        actual_columns = X_new_df.columns.tolist()
+        self.assertEqual(expected_columns, actual_columns, "Column names do not match the expected names")
+
     def test_greedy_alg_with_aux_at_targets_without_task_loader_raises_value_error(
         self,
     ):