Fuzzy C-Means for Fuzzy Data // Implements a fuzzy clustering approach for ordinal Likert-type data using triangular fuzzy numbers (TFNs). The package extends the classical fuzzy C-means algorithm to better handle uncertainty in ordinal scales and includes automatic selection of the number of clusters using the Xie-Beni validity index. References: Coppi, R., D'Urso, P., and Giordani, P. (2012), "Fuzzy and possibilistic clustering for fuzzy data", doi:10.1016/j.csda.2010.09.013. Xie, X. L. and Beni, G. (1991), "A validity measure for fuzzy clustering", doi:10.1109/34.85677.