// Polynomial fit test using delta Cephei data.
public void testDegree2() {
TSPolynomialFitter fitter = new TSPolynomialFitter(obs);
fitter.setDegree(2);
try {
fitter.execute();
List<ValidObservation> fitObs = fitter.getFit();
assertEquals(polyfit_degree2.length, fitObs.size());
for (int i = 0; i < fitObs.size(); i++) {