import { ClassificationCriterion, RegressionCriterion, ImpurityMeasure } from './Criterion';
import { int } from '../randUtils';
import { Serialize } from '../simpleSerializer';
export interface Split {
    feature: int;
    threshold: int;
    pos: int;
    impurityLeft: number;
    impurityRight: number;
    foundSplit: boolean;
}
export declare function makeDefaultSplit(): {
    feature: number;
    threshold: number;
    pos: number;
    impurityLeft: number;
    impurityRight: number;
    foundSplit: boolean;
};
export declare class Splitter extends Serialize {
    kMinSplitDiff: number;
    X: number[][];
    y: int[];
    criterion: ClassificationCriterion | RegressionCriterion;
    start: int;
    end: int;
    minSamplesLeaf: int;
    maxFeatures: int;
    featureOrder: int[];
    shuffleFeatures: boolean;
    sampleMap: Int32Array;
    nSamplesTotal: int;
    nFeatures: int;
    name: string;
    constructor({ X, y, minSamplesLeaf, impurityMeasure, maxFeatures, samplesSubset }: {
        X: number[][];
        y: int[];
        minSamplesLeaf: int;
        impurityMeasure: ImpurityMeasure;
        maxFeatures: int;
        samplesSubset: int[];
    });
    resetSampleRange(start: int, end: int): void;
    splitNode(): Split;
}