mars.dataframe.Series.nunique

Series.nunique(dropna=True, combine_size=None)

Return number of unique elements in the object.

Excludes NA values by default.

Parameters

• dropna (bool, default True) – Don’t include NaN in the count.

• combine_size (int, optional) – The number of chunks to combine.

Returns

Return type

int

See also

DataFrame.nunique

Method nunique for DataFrame.

Series.count

Count non-NA/null observations in the Series.

Examples

>>> import mars.dataframe as md
>>> s = md.Series([1, 3, 5, 7, 7])
>>> s.execute()
0    1
1    3
2    5
3    7
4    7
dtype: int64

>>> s.nunique().execute()
4

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