Struct StatWaterfall 

pub struct StatWaterfall {
    pub totals: Vec<String>,
    pub final_total: Option<String>,
}

Cumulative-sum stat behind GeomWaterfall.

Output columns: x, y (running total after the step), ymin/ymax (bar extent), start (running total before the step), delta (the step’s own value; the total for total bars) and direction (WATERFALL_INCREASE / WATERFALL_DECREASE / WATERFALL_TOTAL). Every other input column is carried through row by row (Na on an appended final total).

Fields

totals: Vec<String>

x levels drawn as total bars (0 → running total); their y is ignored.

final_total: Option<String>

Append a closing total bar with this x label.

Trait Implementations

impl Clone for StatWaterfall

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatWaterfall

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

Formats the value using the given formatter.

impl Default for StatWaterfall

fn default() -> Self

Returns the “default value” for a type.

impl Stat for StatWaterfall

fn panelwise(&self) -> bool

The running total spans every step of the panel, not one aesthetic group (a discrete x would otherwise make each step its own group).

fn compute_group(&self, data: &DataFrame, _scales: &ScaleSet) -> DataFrame

Transform data for a single group.

fn required_aes(&self) -> Vec<Aesthetic>

Required aesthetics this stat needs.

fn name(&self) -> &str

Name for debug/display.

fn default_aes(&self) -> Aes

Default aesthetic mappings this stat produces.

fn validate(&self, _warnings: &mut Vec<String>)

Validate the stat’s own fixed configuration (not the data) and push a human-readable warning for each problem found — e.g. StatBinHex::binwidth being NaN, zero or negative. Called once per layer, before compute_group runs (which has no warnings channel of its own: the per-group call only sees &DataFrame and &ScaleSet, not the plot’s warnings sink). Default: no-op.