import type { DataXY } from 'cheminfo-types';
export interface XFunctionFilter {
    name: 'xFunction';
    options?: XFunctionOptions;
}
export interface XFunctionOptions {
    /**
     * Will apply a function on the X variable on each element of the array described as a string
     * In front of sequence of lowercase we will add 'Math.'. This allows to write
     * `sin(x) + cos(x)` and it will be replace internally by (x) => (Math.sin(x) + Math.cos(x))
     * @default ''
     */
    function?: string;
}
/**
 * Filter that allows to
 * @param data
 * @param options
 */
export declare function xFunction(data: DataXY<Float64Array>, options?: XFunctionOptions): {
    data: DataXY<Float64Array>;
};
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