| ARI.F | Fuzzy adjusted Rand index |
| butterfly | Butterfly data |
| cl.memb | Cluster membership |
| cl.memb.H | Cluster membership |
| cl.memb.t | Cluster membership |
| cl.size | Cluster size |
| cl.size.H | Cluster size |
| Fclust | Fuzzy clustering |
| Fclust.compare | Similarity between partitions |
| Fclust.index | Cluster validity indexes |
| FKM | Fuzzy k-means |
| FKM.ent | Fuzzy k-means with entropy regularization |
| FKM.ent.noise | Fuzzy k-means with entropy regularization and noise cluster |
| FKM.gk | Gustafson and Kessel - like fuzzy k-means |
| FKM.gk.ent | Gustafson and Kessel - like fuzzy k-means with entropy regularization |
| FKM.gk.ent.noise | Gustafson and Kessel - like fuzzy k-means with entropy regularization and noise cluster |
| FKM.gk.noise | Gustafson and Kessel - like fuzzy k-means with noise cluster |
| FKM.gkb | Gustafson, Kessel and Babuska - like fuzzy k-means |
| FKM.gkb.ent | Gustafson, Kessel and Babuska - like fuzzy k-means with entropy regularization |
| FKM.gkb.ent.noise | Gustafson, Kessel and Babuska - like fuzzy k-means with entropy regularization and noise cluster |
| FKM.gkb.noise | Gustafson, Kessel and Babuska - like fuzzy k-means with noise cluster |
| FKM.med | Fuzzy k-medoids |
| FKM.med.noise | Fuzzy k-medoids with noise cluster |
| FKM.noise | Fuzzy k-means with noise cluster |
| FKM.pf | Fuzzy k-means with polynomial fuzzifier |
| FKM.pf.noise | Fuzzy k-means with polynomial fuzzifier and noise cluster |
| houseVotes | Congressional Voting Records Data |
| Hraw | Raw prototypes |
| JACCARD.F | Fuzzy Jaccard index |
| Mc | McDonald's data |
| MPC | Modified partition coefficient |
| NBA | NBA teams data |
| NEFRC | Non-Euclidean Fuzzy Relational Clustering |
| NEFRC.noise | Non-Euclidean Fuzzy Relational Clustering with noise cluster |
| PC | Partition coefficient |
| PE | Partition entropy |
| plot.fclust | Plotting fuzzy clustering output |
| print.fclust | Printing fuzzy clustering output |
| RI.F | Fuzzy Rand index |
| SIL | Silhouette index |
| SIL.F | Fuzzy silhouette index |
| summary.fclust | Summarizing fuzzy clustering output |
| synt.data | Synthetic data |
| synt.data2 | Synthetic data |
| unemployment | Unemployment data |
| VAT | Visual Assessment of (Cluster) Tendency |
| VCV | Visual Cluster Validity |
| VCV2 | (New) Visual Cluster Validity |
| VIFCR | Visual inspection of fuzzy clustering results |
| XB | Xie and Beni index |