From 517d8f8b8980b4c26eb7a4866c9c02dd17b74e9c Mon Sep 17 00:00:00 2001
From: Philipp Rudiger <P.Rudiger@ed.ac.uk>
Date: Sat, 14 Jul 2018 12:37:09 +0100
Subject: [PATCH] Minor fix for invalid bound ranges

---
 holoviews/core/util.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/holoviews/core/util.py b/holoviews/core/util.py
index d0fe701b04..5a4c1d6f85 100644
--- a/holoviews/core/util.py
+++ b/holoviews/core/util.py
@@ -1631,6 +1631,8 @@ def bound_range(vals, density, time_unit='us'):
     assumed to be evenly spaced. Density is rounded to machine precision
     using significant digits reported by sys.float_info.dig.
     """
+    if not len(vals):
+        return(np.nan, np.nan, density, False)
     low, high = vals.min(), vals.max()
     invert = False
     if len(vals) > 1 and vals[0] > vals[1]: