Enum Agg 

pub enum Agg {
    First,
    Max,
    Min,
    Last,
    Sum,
}

A column aggregator over a period’s rows.

Variants

First

First value.

Max

Maximum (numeric / datetime).

Min

Minimum (numeric / datetime).

Last

Last value.

Sum

Sum (numeric).

Implementations

impl Agg

pub fn from_name(s: &str) -> Result<Agg>

Parse an aggregator name (first / max / min / last / sum).

pub fn as_combine_op(&self) -> CombineOp

The in-place single-cell combine op equivalent to this aggregator — the incremental dual of Self::reduce, used by the live tf-fold to update the forming bar without re-reducing the whole period.

pub fn reduce(&self, col: &Column, kept: &[usize]) -> Result<Column>

Reduce the values at kept positions of col to a 1-element column of the appropriate dtype.

Trait Implementations

impl Clone for Agg

fn clone(&self) -> Agg

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Agg

impl Debug for Agg

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

Formats the value using the given formatter.

impl Eq for Agg

impl PartialEq for Agg

fn eq(&self, other: &Agg) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Agg