import type { NumberArray } from 'cheminfo-types';
export interface SGGOptions {
    /**
     * @default 9
     */
    windowSize?: number;
    /**
     * @default 0
     */
    derivative?: number;
    /**
     * @default 3
     */
    polynomial?: number;
}
/**
 * Apply Savitzky Golay algorithm.
 * @param ys - Array of y values.
 * @param xs - Array of X or deltaX.
 * @param options - Options controlling window size, derivative and polynomial order.
 * @returns Array containing the new ys (same length).
 */
export declare function sgg(ys: NumberArray, xs: NumberArray | number, options?: SGGOptions): Float64Array;
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