pyspark.pandas.window.Expanding.max#

Expanding.max()[source]#

Calculate the expanding maximum.

Note

the current implementation of this API uses Spark’s Window without specifying partition specification. This leads to move all data into single partition in single machine and could cause serious performance degradation. Avoid this method against very large dataset.

Returns

Series or DataFrame: Return type is determined by the caller.

See also

pyspark.pandas.Series.expanding: Calling object with Series data.
pyspark.pandas.DataFrame.expanding: Calling object with DataFrames.
pyspark.pandas.Series.max: Similar method for Series.
pyspark.pandas.DataFrame.max: Similar method for DataFrame.

Examples

Performing a expanding minimum with a window size of 3.

>>> s = ps.Series([4, 3, 5, 2, 6])
>>> s.expanding(3).max()
0    NaN
1    NaN
2    5.0
3    5.0
4    6.0
dtype: float64