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Table 2 Validation of FCM clustering for simulated data by normalization. Adjusted Rand indices for clusters by applying the FCM method to three simulated datasets normalized using three methods, where the fuzzification (m) value used was either the optimal value or m = 2.

From: Effect of data normalization on fuzzy clustering of DNA microarray data

Data\method

When m is optimal

When m is fixed to 2

 

Z

R

Lowess

Z

R

Lowess

SD1/450

0.47

0.44

0.82

0.49

0.40

0.81

SD2/450

0.43

0.38

0.70

0.49

0.41

0.77

SD3/180

0.12

0.10

0.60

0.15

0.14

0.58