Function guessOrdinal

libs/echarts/echarts.simple.js:21104–21113

* The rule should not be complex, otherwise user might not * be able to known where the data is wrong. * The code is ugly, but how to make it neat? * * @param {module:echars/data/Source} source * @param {number} dimIndex * @return {BE_ORDINAL} guess result.

(source, dimIndex)

 * @return {BE_ORDINAL} guess result.
 */
function guessOrdinal(source, dimIndex) {
    return doGuessOrdinal(
        source.data,
        source.sourceFormat,
        source.seriesLayoutBy,
        source.dimensionsDefine,
        source.startIndex,
        dimIndex
    );
}

// dimIndex may be overflow source data.
// return {BE_ORDINAL}