import type { ChartPoint, CombinedDataType, Dataset } from './types';
export declare const getMaxYValue: (data?: ChartPoint[]) => number;
export declare const getXLabelsInterval: (totalXGraphCount: number) => number;
export declare const convertDataArrToObj: (data: ChartPoint[], dateFormat?: string) => Object;
export declare const getYLabels: (maxValue: number) => Array<string | number>;
export declare const getXLabel: ({ idx, date, totalCount, xLabelsInterval, chartType, }: {
    idx: number;
    date: Date;
    totalCount: number;
    xLabelsInterval: number;
    chartType?: "line" | "bar" | undefined;
}) => string;
export default function d3Max(values: ChartPoint[], valueof: ((arg0: any, arg1: number, arg2: any) => any) | undefined): ChartPoint | undefined;
export declare const getDataToStack: (datasets: Dataset[]) => CombinedDataType[];