@Override
    public int compareTo(MissingSubSeries o) {
      if (this.getLength() > o.getLength()) {
        return -1;
      } else if (this.getLength() == o.getLength()) {
        return 0;
      } else {
        return 1;
      }
    }
@param slope the slope to set
library-udf/src/main/java/org/apache/iotdb/library/anomaly/util/MissDetector.java