**rk12_test**,
a MATLAB code which
calls rk12(), which
implements Runge-Kutta ODE solvers of orders 1 and 2.

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

rk12, a MATLAB code which implements Runge-Kutta ODE solvers of orders 1 and 2.

- 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_rk1.m approximates the predator-prey problem using a Runge-Kutta method of order 1.
- predator_rk2.m approximates the predator-prey problem using a Runge-Kutta method of order 2.

- predator_rk1_phase.png a phase plot produced by predator_rk1().
- predator_rk2_phase.png a phase plot produced by predator_rk2().
- predator_rk1_plot.png a solution plot produced by predator_rk1().
- predator_rk2_plot.png a solution plot produced by predator_rk2().