Build a Y(admittance) matrix for any power system network with nb buses and nl lines.

Y(admittance) matrix

I have written a code that can determined the bus voltages automatically of any power system network with nb buses and nl lines simply you just have to feed it with the data and it will do the job. At part A it will do it automatically but in part B you have to do modification to matrix Yt . This code can be improved so that it becomes more reliable.