Only one member, both partitions equal to whole set: VI result: 0 Rand result: failed as expected Adjusted Rand result: failed as expected NMI result: 1 Split-join result: 0 Empty sets: VI result: 0 Rand result: failed as expected Adjusted Rand result: failed as expected NMI result: 1 Split-join result: 0 Two equal, differenly labeled partitions: VI result: 0 Rand result: 1 Adjusted Rand result: NaN NMI result: 1 Split-join result: 0 Two different partitions: ((5,1), (8,3,4), (0,6,7,2,9)) and ((5,8), (1,3,4,0), (6,7,2,9)) VI result: 1.1343 Rand result: 0.711111 Adjusted Rand result: 0.312573 NMI result: 0.455859 Split-join result: 6