snowflake.snowpark.DataFrameStatFunctions.approx_quantile¶

DataFrameStatFunctions.approx_quantile(col: Union[Column, str, Iterable[Union[Column, str]]], percentile: Iterable[float], *, statement_params: Optional[Dict[str, str]] = None) → Union[List[float], List[List[float]]][source]¶

For a specified numeric column and a list of desired quantiles, returns an approximate value for the column at each of the desired quantiles. This function uses the t-Digest algorithm.

Examples:

>>> df = session.create_dataframe([1, 2, 3, 4, 5, 6, 7, 8, 9, 0], schema=["a"])
>>> df.stat.approx_quantile("a", [0, 0.1, 0.4, 0.6, 1])  

>>> df2 = session.create_dataframe([[0.1, 0.5], [0.2, 0.6], [0.3, 0.7]], schema=["a", "b"])
>>> df2.stat.approx_quantile(["a", "b"], [0, 0.1, 0.6])
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Parameters:

  • col – The name of the numeric column.

  • percentile – A list of float values greater than or equal to 0.0 and less than 1.0.

  • statement_params – Dictionary of statement level parameters to be set while executing this action.

Returns:

A list of approximate percentile values if col is a single column name, or a matrix with the dimensions (len(col) * len(percentile) containing the approximate percentile values if col is a list of column names.

Language: English