import type { NumberArray } from 'cheminfo-types';
export interface XIsEquallySpacedOptions {
    /**
     * The tolerance define what is the allowed difference in percent
     * @default: 0.05
     */
    tolerance?: number;
}
/**
 * Check if the values are separated always by the same difference
 * @param array - Monotone growing array of number
 * @param options
 */
export declare function xIsEquallySpaced(array: NumberArray, options?: XIsEquallySpacedOptions): boolean;
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