@Override
  public void transform(Row row, PointCollector pointCollector) throws Exception {
    timestamp.add(row.getTime());
    value.add(Util.getValueAsDouble(row));
  }
This function calculates inverse discrete wavelet transform of an input series, which is composed
of multiple layers. Input series must be an integer exponent of 2. Input series is treated as
sampled in equal distances.
library-udf/src/main/java/org/apache/iotdb/library/frequency/UDTFIDWT.java