Hi all,
First I'd like to give heartfelt thank to the sympy team. It's really
a good package, and it helps me a lot as I'm working on some
calculations of dynamic systems.
I'm a newbie to sympy. The problem is, I do not know whether it is
possible to get the derivative with respect to a function, not a
symbol. The code is like this:
t = Symbol("t")
f = Function("f")
theta = f(t)
theta_dot = diff(theta,t,1)
x = theta*theta_dot
y = diff(x,theta_dot,1)
Then the output is
D(f(t)*D(f(t), t), D(f(t), t))
However, my expected output should be "theta" or "f(t)" instead.
Does anyone get an idea about this?
Thanks in advance.
Best regards
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