export type Kernel = (u: number) => number;
export declare const gaussian: Kernel;
export declare const epanechnikov: Kernel;
export declare function scott(n: number, std: number, dim?: number): number;
export declare function silverman(n: number, std: number, dim?: number): number;
export interface KDEOptions {
    kernel?: Kernel;
    bandwidth?: number;
    bandwidthMethod?: 'scott' | 'silverman';
}
export interface KDEEvaluator {
    bandwidth: number;
    kernel: Kernel;
    evaluate: ((x: number) => number) & ((xs: number[]) => number[]);
    evaluateGrid: (N: number) => {
        x: number;
        y: number;
    }[];
}
export declare function kde(data: number[], options?: KDEOptions): KDEEvaluator;
export default kde;