columna API reference - v0.4.0
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    Interface PeriodogramResult

    interface PeriodogramResult {
        detrend: "mean" | "none" | "linear";
        dominant: { frequency: number; period: number; power: number }[];
        frequency: number[];
        n: number;
        period: number[];
        power: number[];
        spans?: number[];
        spectrum: number[];
    }
    Index
    detrend: "mean" | "none" | "linear"
    dominant: { frequency: number; period: number; power: number }[]

    Frequencies ordered by power (top 5).

    frequency: number[]

    Fourier frequencies k/n for k = 1 … ⌊n/2⌋ (cycles per observation).

    n: number
    period: number[]
    power: number[]

    Two-sided periodogram I(f) = |Σ xₜ e^{−2πift}|² / n.

    spans?: number[]
    spectrum: number[]

    One-sided spectral density estimate (2·I(f) except at the Nyquist frequency).