newton-jacobian method for non-linear circuit

how can I write the code for newton-jacobian method in matlab for non-linear circuits. I need to solve this for 2*2 and 3*3 matrix.

Answer 1

[Zoltán Csáti]

If you think of the Newton-method using the Jacobian matrix, then there are lots of submissions on the internet. You can find many of them on the File Exchange too. However the simple Newton-method is not appropriate in most cases. Extend it with a line-search. If you have the Optimization Toolbox, use its fsolve function.

If you need to implement it on your own, then here is a resource: http://www.maths.lth.se/na/courses/FMN081/FMN081-06/lecture7.pdf.