code: protected double getOldCentroidScore(DoubleVector vector,
                                           int oldCentroidIndex,
                                           int altClusterSize) {
          double newScore = simToComplete[oldCentroidIndex];
          newScore -= VectorMath.dotProduct(completeCentroid, vector);
          newScore /= subtractedMagnitudeSqrd(
                  centroids[oldCentroidIndex], vector);
          return newScore;
      }
docs: {@inheritDoc}