get the derivative with ode45
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Hello every one! I'm trying to solve a differential equation y' = f(t,y) with MATLAB ode45. Besides the original y, y' is also very useful to me. But I simply don't know how to get it. Is there any convenient method? Or what I can do is just to compute y in many point and use diff? Thank you very much!
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Jan
2011-8-1
ODE45 replies the arrays y(t_i) and t_i. You have defined the function y'=f(t, y). If f is defined such that it accepts vectors as input, getting y' should be trivial:
[t, y] = ode45(@f, ...)
yd = f(t, y)
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