Instances dataSet = new Instances(relationName, atts,
m_cumulativeInstances.size());
for (int i = 0; i < m_cumulativeInstances.size(); i++) {
current = ((FastVector) m_cumulativeInstances.elementAt(i));
double[] vals = new double[dataSet.numAttributes()];
for (int j = 0; j < current.size(); j++) {
Object cval = current.elementAt(j);
if (cval instanceof String) {