import type { FromTo } from 'cheminfo-types';
export interface XZonesEquallySpacedOptions {
    /**
     * from - the minimum x value
     * @default zones[0].from
     */
    from?: number;
    /**
     * to - the maximum x value
     * @default zones[zones.length-1].to
     */
    to?: number;
}
/**
 * Function that returns a Number array of equally spaced numberOfPoints x values
 * distributed across the specified zones.
 * @param zones - array of from/to zones where x values should be distributed
 * @param numberOfPoints - total number of points to distribute across all zones
 * @param options - options
 * @returns array of equally spaced x values distributed across zones
 */
export declare function zonesToXEquallySpaced(zones: FromTo[], numberOfPoints: number, options?: XZonesEquallySpacedOptions): Float64Array;
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