Function countSeriesOnAxisOnKey

src/coord/axisStatistics.ts:270–287

(
    axis: Axis,
    axisStatKey: AxisStatKey,
)

 *  - series filtered out are excluded.
 */
export function countSeriesOnAxisOnKey(
    axis: Axis,
    axisStatKey: AxisStatKey,
): number {
    if (__DEV__) {
        assert(axisStatKey != null);
        validateInputAxis(axis);
    }
    const perKeyPerAxis = getAxisStatPerKeyPerAxis(axis, axisStatKey);
    if (!perKeyPerAxis || !perKeyPerAxis.sers.length) {
        return 0;
    }
    let count = 0;
    eachSeriesDealForAxisStat(axis.model.ecModel, perKeyPerAxis.sers, function () {
        count++;
    });
    return count;
}

/**
 * NOTICE: Available after `CoordinateSystem['create']` (not included).