tauDown_Q

Construct initial \(\tau\) with \(Q\) groups from value obtained at \(Q+1\) groups

internal

Stochastic block model used for dynamic graphs represented by Poisson processes.
To model recurrent interaction events in continuous time, an extension of the stochastic block model is proposed where every individual belongs to a latent group and interactions between two individuals follow a conditional inhomogeneous Poisson process with intensity driven by the individuals’ latent groups. The model is shown to be identifiable and its estimation is based on a semiparametric variational expectation-maximization algorithm. Two versions of the method are developed, using either a nonparametric histogram approach (with an adaptive choice of the partition size) or kernel intensity estimators. The number of latent groups can be selected by an integrated classification likelihood criterion.
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G. Grégoire (1993). <http://www.jstor.org/stable/4616289>.
L. Hubert and P. Arabie (1985). <doi:10.1007/BF01908075>.
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C. Matias, T. Rebafka and F. Villers (2018). <doi:10.1093/biomet/asy016>.
C. Matias and S. Robin (2014). <doi:10.1051/proc/201447004>.
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Daphnc3<a9> Giorgi

ppsbm

Clustering in Longitudinal Networks

Daphné Giorgi

Catherine Matias

Tabea Rebafka

Fanny Villers

tauDown_Q function

<dl><dt>tau</dt>
<dd>\(\tau\)</dd>
<dt>n_perturb</dt>
<dd>Number of different perturbations on k-means result</dd></dl>

Arguments

Construct initial \(\tau\) from \(Q+1\) — tauDown_Q

<dl>

<dt>tau</dt>
<dd>\(\tau\)</dd>


<dt>n_perturb</dt>
<dd>Number of different perturbations on k-means result</dd>

</dl>

tauDown_Q: Construct initial \(\tau\) from \(Q+1\)

Description

Usage

Value

Arguments