I have a system of 2 second order ODEs, which i converted to a system of fist order ODEs, which ode45 (or ode15s) needs as an input
my system input looks like this:
as an output i get the vector , but I need the derivatives and . How can i get those?
I tried using the gradient function as suggested by Star Strider in this question: How to output derivative from ODE 45 but unfortunately that did not help.
Thanks in advance!
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