Distance_for_KNN_test   Distance for KNN Test The Distance_for_KNN_test
                        returns the distance matrix between the test
                        set and the training set.
k.nearest.neighbors     k-Nearest Neighbors the 'k.nearest.neigbors'
                        gives the list of points (k-Neigbours) that are
                        closest to the row i in descending order.
knn_test_function       KNN Test The knn_test_function returns the
                        labels for a test set using the k-Nearest
                        Neighbors Clasification method.
knn_training_function   KNN Training The knn_training_function returns
                        the labels for a training set using the
                        k-Nearest Neighbors Clasification method.
