public void GetSubVector()
 {
   ComplexDoubleVector test = new ComplexDoubleVector(new double[4]{0,1,2,3});
   ComplexDoubleVector subvector = test.GetSubVector(1,2);
   
   Assert.AreEqual(subvector.Length,2);
   Assert.AreEqual(subvector[0],test[1]);
   Assert.AreEqual(subvector[1],test[2]);
 }