The asymptotic distribution of modularity in weighted signed networks.
The asymptotic distribution of modularity in weighted signed networks.
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DOI:
10.1093/biomet/asaa059
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发表时间:
2021-03
期刊:
影响因子:
2.7
通讯作者:
Barnett I
中科院分区:
文献类型:
--
作者:
Ma R;Barnett I
Modularity is a popular metric for quantifying the degree of community structure within a network. The distribution of the largest eigenvalue of a network’s edge weight or adjacency matrix is well studied and is frequently used as a substitute for modularity when performing statistical inference. However, we show that the largest eigenvalue and modularity are asymptotically uncorrelated, which suggests the need for inference directly on modularity itself when the network size is large. To this end, we derive the asymptotic distributions of modularity in the case where the network’s edge weight matrix belongs to the Gaussian orthogonal ensemble, and study the statistical power of the corresponding test for community structure under some alternative models. We empirically explore universality extensions of the limiting distribution and demonstrate the accuracy of these asymptotic distributions through Type I error simulations. We also compare the empirical powers of the modularity based tests with some existing methods. Our method is then used to test for the presence of community structure in two real data applications.
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影响因子:
3
作者:
Langfelder P;Horvath S
通讯作者:
Horvath S
影响因子:
2.3
作者:
BAI, ZD;YIN, YQ
通讯作者:
YIN, YQ
影响因子:
1.2
作者:
Ding, Xiucai
通讯作者:
Ding, Xiucai
影响因子:
1.7
作者:
Erdos, Laszlo;Yau, Horng-Tzer;Yin, Jun
通讯作者:
Yin, Jun
DOI:
10.1073/pnas.0605965104
发表时间:
2007-01-02
影响因子:
11.1
作者:
Fortunato, Santo;Barthelemy, Marc
通讯作者:
Barthelemy, Marc