根据IEEE标准算例给出的9节点网络图，利用MATLAB软件编程计算其节点导纳矩阵（含有解释）。当然，依据程序稍作修改可以求IEEE算例中的任意节点导纳矩阵。-Example is given according to the IEEE standard 9-node network diagram, using MATLAB software program to calculate the nodal admittance matrix (with explanation). Of course, some slight modifications according to the program can find examples of any IEEE nodal admittance matrix.