import { Table, ColumnGroupMap, Scale, NumericColumnData, SymbolType, BandIndexMap } from '../types';
export declare const createGroupIDColumn: (table: Table, columnKeys: string[]) => [NumericColumnData, ColumnGroupMap];
export declare const getNominalColorScale: (groupMap: ColumnGroupMap, colors: string[]) => Scale<number, string>;
export declare const getBandColorScale: (bandIndexMap: BandIndexMap, colors: string[]) => Scale<number, string>;
export declare const getContinuousColorScale: (domain: [number, number], colors: string[]) => Scale<number, string>;
export declare const getSymbolScale: (columnGroupMap: ColumnGroupMap) => Scale<number, SymbolType>;
