pandas.Series.cat.as_ordered

Series.cat.as_ordered()

Set the Categorical to be ordered.

Returns:

Categorical

Ordered Categorical.

See also

as_unordered

Set the Categorical to be unordered.

Examples

For pandas.Series:

>>> ser = pd.Series(["a", "b", "c", "a"], dtype="category")
>>> ser.cat.ordered
False
>>> ser = ser.cat.as_ordered()
>>> ser.cat.ordered
True

For pandas.CategoricalIndex:

>>> ci = pd.CategoricalIndex(["a", "b", "c", "a"])
>>> ci.ordered
False
>>> ci = ci.as_ordered()
>>> ci.ordered
True