# Using SOLVE with large number of equations and variables

10 visualizzazioni (ultimi 30 giorni)
M.P. il 2 Gen 2020
Risposto: Pujitha Narra il 6 Gen 2020
Is there a way to use the command X = solve([eqn1, eqn2, eqn3, [x1 x2 x3]) for very large number of equations and variables without typing explicitly :equ1, equ2, equ3 and x1,x2,x3? The equations are Kirchoff's loop and node equations and the variables are the currents.
##### 3 CommentiMostra 2 commenti meno recentiNascondi 2 commenti meno recenti
J. Alex Lee il 6 Gen 2020
Your problem seems not to be about solving the system (using direct versus iterative methods), but rather about the programming to sett up the problem. Also, I think I'm out of my depth if you are wanting to use symbolic toolbox.
Generally, if you have rules governing your equations, you can use things like loops to efficiently code them in.

Accedi per commentare.

### Risposta accettata

Pujitha Narra il 6 Gen 2020
As far as I understand, you are looking for simpler way to solve the Kirchoff's loop equations.
In your case, it is right that you could use iterative methods. Especially Gauss-Seidel and Jacobian methods would be of great help for solving Kirchoff's loop equations as far as I know. These are good for sparse matrices.
The following link would lead you to a MATLAB File Exchange page which could help you get started with the above mentioned iterative methods. Please note that MATLAB File Exchange is community based and any further queries regarding the code can be directed to the author.
##### 0 CommentiMostra -1 commenti meno recentiNascondi -1 commenti meno recenti

Accedi per commentare.

### Categorie

Scopri di più su Solver Outputs and Iterative Display in Help Center e File Exchange

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by