/**
 * Computes the yule distance between `a` and `b`.
 *
 * @category Metrics
 * @param {number[] | Float64Array} a
 * @param {number[] | Float64Array} b
 * @returns {number} The yule distance between `a` and `b`.
 */
export function yule(a: number[] | Float64Array, b: number[] | Float64Array): number;
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