21-May-2021 11:53:42 spring_ode_test(): MATLAB/Octave version 4.2.2 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 = 93 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. 21-May-2021 11:53:45