function niter = loopy_converged(engine)% LOOPY_CONVERGED Did loopy belief propagation converge? 0 means no, eles we return the num. iterations.% function niter = loopy_converged(engine)%% We use a simple heuristic: we say convergence occurred if the number of iterations% used was less than the maximum allowed.if engine.niter == engine.max_iter  niter = 0;else  niter = engine.niter;end%conv = (strcmp(engine.protocol, 'tree') | (engine.niter < engine.max_iter));