From f7f2d1ce25ada8ad6e3927f94451c37448b7b6f8 Mon Sep 17 00:00:00 2001
From: Andrew <15331990+ahuang11@users.noreply.github.com>
Date: Thu, 2 May 2024 11:28:25 -0700
Subject: [PATCH] fix dims without coords (#1334)

---
 hvplot/tests/testui.py | 7 +++++++
 hvplot/ui.py           | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/hvplot/tests/testui.py b/hvplot/tests/testui.py
index 0c93d471d..035fe09d8 100644
--- a/hvplot/tests/testui.py
+++ b/hvplot/tests/testui.py
@@ -1,6 +1,7 @@
 import re
 from textwrap import dedent
 
+import numpy as np
 import holoviews as hv
 import pandas as pd
 import hvplot.pandas
@@ -381,3 +382,9 @@ def test_explorer_code_opts():
             color_levels=3,
         )
         ```""")
+
+
+def test_explorer_xarray_multi_var_extra_dims_no_coord():
+    ds = xr.tutorial.open_dataset('air_temperature')
+    ds['lat_bnds'] = (('bnds', 'lat'), np.vstack([ds['lat'], ds['lat']]))
+    assert ds.hvplot.explorer()
diff --git a/hvplot/ui.py b/hvplot/ui.py
index c2e750e07..ee6f260b0 100644
--- a/hvplot/ui.py
+++ b/hvplot/ui.py
@@ -896,6 +896,11 @@ def __init__(self, ds, **params):
                 ds = ds[data_vars[0]]
                 var_name_suffix = f"['{data_vars[0]}']"
             else:
+                missing_dims = set(ds.dims) - set(ds.coords)
+                if missing_dims:
+                    # fixes https://github.com/holoviz/hvplot/issues/1272
+                    for dim in missing_dims:
+                        ds.coords[dim] = np.arange(len(ds[dim]))
                 ds = ds.to_array('variable').transpose(..., 'variable')
                 var_name_suffix = ".to_array('variable').transpose(..., 'variable')"
         if 'kind' not in params: