columna API reference - v0.3.0
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    Interface T2ChartResult

    interface T2ChartResult {
        alpha: number;
        contributions: { byVariable: number[]; index: number }[];
        covariance: Matrix;
        k: number;
        m: number;
        mean: number[];
        outOfControl: number[];
        p: number;
        phase: 1 | 2;
        t2: number[];
        type: "T2";
        ucl: number;
    }
    Index
    alpha contributions covariance k m mean outOfControl p phase t2 type ucl
    alpha: number
    contributions: { byVariable: number[]; index: number }[]

    Decomposition of each out-of-control T² into per-variable contributions (T² − T²₋ⱼ).

    covariance: Matrix
    k: number
    m: number
    mean: number[]
    outOfControl: number[]
    p: number

    Number of variables p, subgroup size m (1 for individuals), number of (sub)groups k.

    phase: 1 | 2
    t2: number[]
    type: "T2"
    ucl: number

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