This a MATLAB code (function) which elects two new nodes each time. Nodes are elected relatively to their distance in term of hop count to the initiator. This code is used by tree construction algorithm in networks modeled as weighted matrix. -This is a MATLAB code (function) which elects two new nodes each time. Nodes are elected relatively to their distance in term of hop count to the initiator.　This code is used by tree construction algorithm in networks modeled as weighted matrix.