A synthetic data set described by Pal et al (2005). It consists of two continous variables forming two well-separated clusters in addition to two noise.
Usage
data(x12)
Arguments
Format
A data frame with 12 rows and 2 numeric variables:
p1
a numeric variable ranging from -5.0 to 5.0
p2
a numeric variable ranging from -1.67 to 10.0
References
Pal, N. R., Pal, K. & Bezdek, J. C. (2005). A possibilistic fuzzy c-means clustering algorithm. IEEE
Trans. Fuzzy Systems, 13 (4): 517-530. <doi:10.1109/TFUZZ.2004.840099>