Function createOrdinals

packages/sanddance-specs/src/ordinal.ts:12–41

(source: string, prefix: string, binFields: string[], sortOrder: SortOrder)

}

export function createOrdinals(source: string, prefix: string, binFields: string[], sortOrder: SortOrder): OrdinalResult {
    const _binFields = binFields.map(safeFieldName);
    const dataName = `${prefix}_bin_order`;
    const data: Data = {
        name: dataName,
        source,
        transform: [
            {
                type: 'aggregate',
                groupby: _binFields,
            },
            {
                type: 'collect',
                sort: {
                    field: _binFields,
                    order: _binFields.map(f => sortOrder),
                },
            },
            {
                type: 'window',
                ops: ['row_number'],
                as: [FieldNames.Ordinal],
            },
        ],
    };
    return {
        data,
        scale: ordinalScale(dataName, `scale_${prefix}_order`, binFields),
    };
}

export function ordinalScale(dataName: string, scaleName: string, binFields: string[]): OrdinalScale {
    return {