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Author: jenshnielsen

docs/changes/newsfragments/8232.improved

@@ -1,3 +1,3 @@
 Fixed :meth:`qcodes.dataset.DataSet.to_xarray_dataset` raising an
-``AlignmentError`` when two data variables do not share the same setpoints
-and one of them is stored as a non-grid (multi-index) array parameter.
+``AlignmentError`` when two data variables do not share the same full set of
+setpoints and one of them is stored as a non-grid (multi-index) array parameter.

src/qcodes/dataset/exporters/export_to_xarray.py

@@ -357,11 +357,10 @@ def load_to_xarray_dataset(
         dataset, data, use_multi_index=use_multi_index
     )
 
-    # When two data variables do not share the same setpoints, one may be
+    # When two data variables do not share the same full set of setpoints, one may be
     # exported using a pandas MultiIndex (non-grid data) while another uses a
-    # standalone dimension for a shared setpoint coordinate.  xr.merge raises
-    # an AlignmentError in that case because the same coordinate name has
-    # different Index objects in the two sub-datasets.  Resolve this by
+    # standalone dimension for a shared setpoint coordinate. xr.merge raises
+    # an AlignmentError in that case because the shared coordinate name has
     # unstacking the multi_index into proper independent dimensions (accepting
     # NaN for missing grid points) so that the shared coordinate becomes a
     # plain 1-D dimension in all sub-datasets.

tests/dataset/test_dataset_export.py

@@ -2334,11 +2334,11 @@ def test_export_to_xarray_dataset_different_setpoints(
     """
     Regression test for https://github.com/microsoft/Qcodes/issues/8232
 
-    Export to xarray should succeed when two data variables do not share the
-    same setpoints.  Specifically, this covers the case where one parameter is
+    Export to xarray should succeed when two data variables do not share the same
+    full set of setpoints. Specifically, this covers the case where one parameter is
     an array-type with setpoints (f_stop, freq) that are NOT on a regular grid
     (so the multi_index path is used), while a second parameter has only the
-    scalar setpoint (f_stop,).  Previously this raised an AlignmentError
+    scalar setpoint (f_stop,). Previously this raised an AlignmentError
     because xr.merge could not reconcile the different Index objects for the
     shared 'f_stop' coordinate.
     """