**rk23_test**,
a MATLAB code which
calls rk23(), which
implements Runge-Kutta ODE solvers of orders 2 and 3.

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

rk23, a MATLAB code which implements Runge-Kutta ODE solvers of orders 2 and 3.

- rk23_test.m calls all the tests.
- rk23_test.sh runs all the tests.
- rk23_test.txt the output file.

- predator_deriv.m evaluates the derivative for the predator-prey problem.
- predator_rk2.m approximates the predator-prey problem using a Runge-Kutta method of order 2.
- predator_rk3.m approximates the predator-prey problem using a Runge-Kutta method of order 3.

- predator_rk2_phase.png a phase plot produced by predator_rk2().
- predator_rk3_phase.png a phase plot produced by predator_rk3().
- predator_rk2_plot.png a solution plot produced by predator_rk2().
- predator_rk3_plot.png a solution plot produced by predator_rk3().