/**
 * Generate an array of "nice" tick values spanning [min, max].
 * @param min - Domain minimum
 * @param max - Domain maximum
 * @param targetCount - Desired number of ticks (approximate)
 */
export declare function computeNiceTicks(min: number, max: number, targetCount: number): number[];
/**
 * Format a numeric tick value for display.
 * Uses K/M/B suffixes for large numbers, fixed decimals for small.
 */
export declare function formatTickValue(val: number): string;
/**
 * Format a timestamp (ms since epoch) as a human-readable date/time label.
 * Adapts precision based on the tick spacing.
 */
export declare function formatDateTickValue(val: number, stepMs?: number): string;