ODE45 returns NaN

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Raquel Andrade
Raquel Andrade on 24 May 2022
Commented: Raquel Andrade on 24 May 2022
I wrote this code to plot the solution of an EDO, but MATLAB just returns NaN values. I can't find my mistake, can anyone help me?
tspan = [0 100];
v0 = 0;
[t,v] = ode45(@(t,v)(4800./(2200.*(1-0.8.^(t./40)))- 9.81),tspan,v0)
figure(1)
plot(t,v,'-o')
xlabel('Time (s)')
ylabel('Speed (m/s)')

Answers (1)

Alan Stevens
Alan Stevens on 24 May 2022
t = 0 causes a problem. Try tspan = [0.1 100]; for example.
  1 Comment
Raquel Andrade
Raquel Andrade on 24 May 2022
It worked, thank you so much!!

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