08-Jan-2022 10:02:53 spring_ode_test(): MATLAB/Octave version 9.8.0.1380330 (R2020a) Update 2 Solve the spring ODE. Parameter values: mass = 5 damping = 2 stiffness = 3 t0 = 0 u0 = 0 v0 = 1 tstop = 25 spring_ode23(): Test spring_ode using ode23. Number of variable steps = 85 Graphics saved in "spring_ode23_y1.png" Graphics saved in "spring_ode23_y2.png" Graphics saved in "spring_ode23_phase.png" Graphics saved in "spring_ode23_conservation.png" spring_ode_test(): Normal end of execution. 08-Jan-2022 10:03:00