import { Distance } from '../metrics';
export type IWeightType = 'uniform' | 'distance';
export interface NeighborHit {
    index: number;
    distance: number;
}
export declare function validateFitData(X: number[][], y: number[]): void;
export declare function validatePredictData(X: number[][], nFeatures: number): void;
export declare function getDistance(metric: Distance.IDistanceType): Distance.IDistance;
export declare function getNeighborHits(trainX: number[][], sample: number[], metric: Distance.IDistanceType, p: number): NeighborHit[];
export declare function getRadiusHits(trainX: number[][], sample: number[], radius: number, metric: Distance.IDistanceType, p: number): NeighborHit[];
export declare function weightedAverage(values: number[], weights: number[]): number;
export declare function weightedMode(labels: number[], weights: number[]): number;
export declare function resolveDistanceWeights(distances: number[]): number[];