Struct GroupBy 

pub struct GroupBy<'a> { /* private fields */ }

Intermediate grouping result. Call .agg() to produce a DataFrame.

Implementations

impl GroupBy<'_>

pub fn n_groups(&self) -> usize

Number of unique groups.

pub fn agg(&self, aggs: &[Agg]) -> Result<DataFrame, DataFrameError>

Apply aggregations and produce a result DataFrame.

The result has one row per group. Group key columns come first, followed by one column per aggregation.

Trait Implementations

impl<'a> Debug for GroupBy<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.