feat: allow weight_by=None in merged_stats

src/invert4geom/uncertainty.py

@@ -293,6 +293,7 @@ def regional_misfit_uncertainty(
     plot: bool = True,
     plot_region: tuple[float, float, float, float] | None = None,
     true_regional: xr.DataArray | None = None,
+    weight_by: str | None = None,
     **kwargs: typing.Any,
 ) -> xr.Dataset:
     """
@@ -368,9 +369,26 @@ def regional_misfit_uncertainty(
     # merge all topos into 1 dataset
     merged = merge_simulation_results(regional_grids)
 
+    # get constraint point RMSE of each model
+    if weight_by == "constraints":
+        weight_vals = []
+        for g in regional_grids:
+            points = utils.sample_grids(
+                constraints_df,
+                g,
+                sampled_name="sampled_regional",
+                coord_names=["easting", "northing"],
+            )
+            weight_vals.append(utils.rmse(points.sampled_regional))
+        # convert residuals into weights
+        weights = [1 / (x**2) for x in weight_vals]
+    else:
+        weights = None
+
     # get stats and weighted stats on the merged dataset
     stats_ds = model_ensemble_stats(
         merged,
+        weights=weights,
     )
 
     if plot is True:
@@ -886,6 +904,8 @@ def merged_stats(
     if weight_by == "residual":
         # get the RMS of the final gravity residual of each model
         weight_vals = [utils.rmse(df[list(df.columns)[-1]]) for df in grav_dfs]
+        # convert residuals into weights
+        weights = [1 / (x**2) for x in weight_vals]
     # get constraint point RMSE of each model
     elif weight_by == "constraints":
         weight_vals = []
@@ -900,10 +920,10 @@ def merged_stats(
             )
             points["dif"] = points.upward - points.sampled_topo
             weight_vals.append(utils.rmse(points.dif))
-
-    # convert residuals into weights
-    weights = [1 / (x**2) for x in weight_vals]
-
+        # convert residuals into weights
+        weights = [1 / (x**2) for x in weight_vals]
+    else:
+        weights = None
     # get stats and weighted stats on the merged dataset
     stats_ds = model_ensemble_stats(
         merged,