A builder object that provides summary statistics about a given column.
Users should not directly create such builders, but instead use one of the methods in
New in version 2.4.0.
Returns an aggregate object that contains the summary of the column with the requested metrics.
Returns an aggregate object that contains the summary of the column with the requested
a column that contains features Vector object.
a column that contains weight value. Default weight is 1.0.
an aggregate column that contains the statistics. The exact content of this
structure is determined during the creation of the builder.