public override void setTargetColumns() {
// assumed that data from file has been pre processed
// TODO this should be
// somewhere else,in the
// super class.
// Type != class Aargh! I want more
// powerful type systems
targetColumnNumbers = new List<int>();
int size = nds[0].Count;
targetColumnNumbers.Add(size - 1); // last column
targetColumnNumbers.Add(size - 2); // last but one column
targetColumnNumbers.Add(size - 3); // and the one before that
}
}