Function stairs_add 

pub fn stairs_add<X: ToString, Y: ToString>(
    plot: &mut Plot<GridCanvas>,
    x: &[X],
    y: &[Y],
    style: StairStyle,
    options: LineplotSeriesOptions,
) -> Result<(), LineplotError>

Adds a staircase series to an existing plot.

Errors

Returns LineplotError::LengthMismatch when lengths differ, LineplotError::EmptySeries for empty input, and LineplotError::InvalidNumericValue when parsing fails.