@krzysztofsztompka/garch
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    Type Alias Window

    Walk-forward, out of sample: is the forecast worth quoting? The same harness arch fits were graded with before this package replaced them.

    type Window = {
        origin: number;
        testEnd: number;
        testStart: number;
    }
    Index
    origin: number

    The last in-sample index; the train window is [0, origin].

    testEnd: number
    testStart: number

    [origin + 1, origin + horizon], always exactly horizon long.