// be a numeric variable.
if (tempHash.size() == 0) {
for (int j = 0; j < m_cumulativeInstances.size(); j++) {
FastVector tempUpdate = ((FastVector) m_cumulativeInstances.elementAt(
j));
Object tempO = tempUpdate.elementAt(i);
if (tempO instanceof String) {// must have been a missing value
} else {
if (!tempHash.containsKey(tempO)) {
tempHash.put(