k =  1  cross-validated accuracy 0.924
k =  3  cross-validated accuracy 0.943
k =  5  cross-validated accuracy 0.952
k =  7  cross-validated accuracy 0.962
k =  9  cross-validated accuracy 0.952
k = 11  cross-validated accuracy 0.943
k = 13  cross-validated accuracy 0.943
k = 15  cross-validated accuracy 0.933
k = 17  cross-validated accuracy 0.914
k = 19  cross-validated accuracy 0.895
k = 21  cross-validated accuracy 0.905
k = 23  cross-validated accuracy 0.895
k = 25  cross-validated accuracy 0.886
k = 27  cross-validated accuracy 0.895
k = 29  cross-validated accuracy 0.886
k = 31  cross-validated accuracy 0.886
best k: 7
test accuracy with k = 7: 0.911
[[15  0  0]
 [ 0 12  3]
 [ 0  1 14]]
