Synthetic data set of two variables
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.
data(x12)
A data frame with 12 rows and 2 numeric variables:
a numeric variable ranging from -5.0 to 5.0
a numeric variable ranging from -1.67 to 10.0
The data set x12 is recommended to test the performances of the possibilistic and probabilistic clustering algorithms.
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>
data(x12) # Descriptive statistics of the data set summary(x12) # Plot the data set pairs(x12, pch=19, cex=2)
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