fast_sbm {nett}

Sample from a SBM (fast)

Description

Samples an adjacency matrix from a stochastic block model (SBM)

Usage

fast_sbm(z, B)

Arguments

z

Node labels (n * 1)

B

Connectivity matrix (K * K)

Details

The function implements a fast algorithm for sampling sparse SBMs, by only sampling the necessary nonzero entries. This function is adapted almost verbatim from the original code by Aiyou Chen.

Value

An adjacency matrix following SBM

Examples

B = pp_conn(n = 10^4, oir = 0.1, lambda = 7, pri = rep(1,3))$B
head(fast_sbm(sample(1:3, 10^4, replace = TRUE), B))