Handled empty values

holoviz · Feb 15, 2018 · ca2382e · ca2382e
1 parent 3a8b71a
commit ca2382e
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diff --git a/holoviews/core/data/interface.py b/holoviews/core/data/interface.py
@@ -290,6 +290,8 @@ def range(cls, dataset, dimension):
                 return (np.nanmin(column), np.nanmax(column))
             except TypeError:
                 column = [v for v in util.python2sort(column) if v is not None]
+                if not len(column):
+                    return np.NaN, np.NaN
                 return column[0], column[-1]
 
     @classmethod

diff --git a/holoviews/core/data/pandas.py b/holoviews/core/data/pandas.py
@@ -292,6 +292,16 @@ def dframe(cls, columns, dimensions):
             return columns.data.copy()
 
 
+    @classmethod
+    def array(cls, dataset, dimensions):
+        if not dimensions:
+            dimensions = dataset.dimensions(label='name')
+        else:
+            dimensions = [dataset.get_dimensions(d).name for d in dimensions]
+        inds = [dataset.data.columns.index(dim.name) for dim in dimensions]
+        return dataset.data.values[:, inds]
+
+
     @classmethod
     def iloc(cls, dataset, index):
         rows, cols = index