export declare function regressionPolynomial(data: any[], x?: (d: any) => number, y?: (d: any) => number, options?: {
    degree?: number;
    alpha?: number;
}): {
    degree: number;
    coef: number[];
    predict: (xx: number) => number;
    rSquared: number;
    evaluateGrid(N: number): {
        x: number;
        y: number;
    }[];
    confidenceInterval(N?: number): {
        x: number;
        mean: number;
        lower: number;
        upper: number;
        predLower: number;
        predUpper: number;
    }[];
};
export default regressionPolynomial;