import { ChartDataPoint, LineChartSeries } from '../types';
/**
 * Custom hook for optimizing chart data calculations
 * Reduces re-calculations by memoizing expensive operations
 */
export declare function useChartData(data?: ChartDataPoint[], series?: LineChartSeries[]): {
    flattenedData: ChartDataPoint[];
    isEmpty: boolean;
    xDomain: [number, number];
    yDomain: [number, number];
    normalizedSeries: LineChartSeries[];
};
/**
 * Hook for memoizing coordinate transformations
 */
export declare function useChartCoordinates(data: ChartDataPoint[], plotArea: {
    x: number;
    y: number;
    width: number;
    height: number;
}, xDomain: [number, number], yDomain: [number, number]): Map<string | number, {
    chartX: number;
    chartY: number;
}>;