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Table 4 Amazon: internal measures

From: Hierarchical community detection via rank-2 symmetric nonnegative matrix factorization

Algorithm

Number of clusters

Coverage (%)

Algorithm time (s)

Total time (s)

Average Ncut

h2-n-a

4989

98.84

466.99

468.09

0.1657

h2-n-x

4988

98.80

452.05

453.13

0.1711

h2-ng-a

4990

98.73

537.82

538.91

0.1617

h2-ng-x

4988

98.66

514.71

515.81

0.1709

h2-ngd-a

4990

98.82

573.64

574.73

0.1491

h2-ngd-x

4990

98.79

560.86

561.96

0.1545

SCD

141,405

100.00

1.86

4.37

0.8418

BigClam

5000

97.31

N/A

169.51

0.3198

Graclus

5000

100.00

119.25

119.45

0.1450

NISE

5182

99.63

990.84

990.86

0.1118