returns a list of length nbOfTau of initial points for tau using spectral clustering with absolute values, kmeans and random perturbations of these points
initialTau(Q, dataMatrix, nbOfTau, percentageOfPerturbation, directed)number of latent blocks in the noisy stochastic block model
observed dense adjacency matrix
number of initializations for the latent block memberships
percentage of node labels that are perturbed to obtain further initial points
booelan to indicate whether the model is directed or undirected
a list of length nbOfTau of initial points for tau