Resolve "bug: too many indices in PlotClimatologicalSkillScore"

Closes #193 (closed)

mlair/helpers/helpers.py

@@ -32,16 +32,21 @@ def dict_to_xarray(d: Dict, coordinate_name: str) -> xr.DataArray:
 
     :return: combined xarray
     """
-    xarray = None
-    for k, v in d.items():
-        if xarray is None:
-            xarray = v
-            xarray.coords[coordinate_name] = k
-        else:
-            tmp_xarray = v
-            tmp_xarray.coords[coordinate_name] = k
-            xarray = xr.concat([xarray, tmp_xarray], coordinate_name)
-    return xarray
+    if len(d.keys()) == 1:
+        k = list(d.keys())
+        xarray: xr.DataArray = d[k[0]]
+        return xarray.expand_dims(dim={coordinate_name: k}, axis=0)
+    else:
+        xarray = None
+        for k, v in d.items():
+            if xarray is None:
+                xarray = v
+                xarray.coords[coordinate_name] = k
+            else:
+                tmp_xarray = v
+                tmp_xarray.coords[coordinate_name] = k
+                xarray = xr.concat([xarray, tmp_xarray], coordinate_name)
+        return xarray
 
 
 def float_round(number: float, decimals: int = 0, round_type: Callable = math.ceil) -> float: