import type { DataXY, PointXY } from 'cheminfo-types';
/**
 * Finds the closest point
 * @param data - x array should be sorted and ascending
 * @param target - target to search
 * @returns - closest point
 */
export declare function xyFindClosestPoint(
/** points */
data: DataXY, target: number): PointXY;
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