How to Plot the stepsize

Hello,

I have an ODE System and I want to solve it with ode45(). Now ode45() has a dynamical step size. BUT how can I plot the stepsize within my time intervall? I want to see in which time my step size increases or decreases.

Thank you very much for your help.

Answer 1

[Star Strider]

The ODE solvers return a [N x 2] matrix [t x]. To get an idea of how your step size changes, I suggest:

x = 0:length(t)-1;
stepsize = diff([0; t]);
plot(x, stepsize)
grid

Alternatively to plot stepsize as a function of the integration times:

plot(t, stepsize)
grid

Is this what you want to do?

[Kim O]

yes thank you very much Star Strider 1 :)

[Star Strider]

It is my pleasure to help! I'm glad it worked the way you wanted it to.