public FitDataIterator(ITuple tuple) {
this.tuple = tuple;
tuple.start();
tuple.next();
valCol = tuple.findColumn("value");
errCol = tuple.findColumn("error");
errMinusCol = tuple.findColumn("minusError");
nVars = tuple.columns() - 3;
vars = new double[nVars];
}
public void start() {
tuple.start();
}