08-Jan-2022 09:18:07 rk4_test(): MATLAB/Octave version 9.8.0.1380330 (R2020a) Update 2 Test rk4(). rk4_predator_test: Solve predator-prey equations using rk4(). Graphics saved as "rk4_predator_plot.png" Graphics saved as "rk4_predator_phase.png" rk4_test(): Normal end of execution. 08-Jan-2022 09:18:12