m_addDateMap = new Add();
m_addDateMap.setAttributeName(m_timeStampName + "-remapped");
m_addDateMap.setInputFormat(result);
result = Filter.useFilter(result, m_addDateMap);
Instance previous = result.instance(0);
// now loop through and compute remapped date
for (int i = 0; i < result.numInstances(); i++) {
Instance current = result.instance(i);
current = m_dateBasedPeriodicity.remapDateTimeStamp(current,