Fix eeglab loading issue while calling _get_montage_information due to scalar x,y,z in 'nodatchans' (mne-tools#13395)

Co-authored-by: Eric Larson <[email protected]>

Author: emrecncelik

doc/changes/dev/13395.bugfix.rst

@@ -0,0 +1 @@
+Fix loading problems caused by attempting to iterate floats in :func:`~mne.read_epochs_eeglab` for specific EEGLab data, by :newcontrib:`Emrecan Çelik`.

doc/changes/names.inc

@@ -76,6 +76,7 @@
 .. _Eduard Ort: https://github.com/eort
 .. _Emily Stephen: https://github.com/emilyps14
 .. _Emma Bailey: https://www.cbs.mpg.de/employees/bailey
+.. _Emrecan Çelik: https://github.com/emrecncelik
 .. _Enrico Varano: https://github.com/enricovara/
 .. _Enzo Altamiranda: https://www.linkedin.com/in/enzoalt
 .. _Eric Larson: https://larsoner.com

mne/io/eeglab/eeglab.py

@@ -166,9 +166,9 @@ def _get_montage_information(eeg, get_pos, *, montage_units):
         nodatchans = eeg.chaninfo["nodatchans"]
         types = nodatchans.get("type", [])
         descriptions = nodatchans.get("description", [])
-        xs = nodatchans.get("X", [])
-        ys = nodatchans.get("Y", [])
-        zs = nodatchans.get("Z", [])
+        xs = np.atleast_1d(nodatchans.get("X", []))
+        ys = np.atleast_1d(nodatchans.get("Y", []))
+        zs = np.atleast_1d(nodatchans.get("Z", []))
 
         for type_, description, x, y, z in zip(types, descriptions, xs, ys, zs):
             if type_ != "FID":