figure1\4_buses_power.mat .......\Figure1_a.m .......\Figure1_b.m .......\Figure1_c.m .......\Figure1_d.m .......\Figure1_e.m .......\Figure1_f.m .......\Figure1_main.m .......\M_x.mat .......\Result_M_A23A24.mat .......\Result_R_A23A24.mat figure1