balanced_accuracy_score
                        Computes balanced accuracy.
curvature_estimation    Computes the curvatures of all samples in the
                        training set.
f1_score                Computes the F1-score.
kKNN                    Adaptive k-Nearest Neighbor Classifier
point_curvature_estimation
                        Computes the curvature of a single test
                        sample's neighborhood.
quantize                Quantizes real values to integer levels.
sigmoid                 A helper sigmoid function.
testa_KNN               Standard k-NN classifier.
