lift_ddts()#
- static QuadraticLifter.lift_ddts(states, ddts)[source]#
Get the time derivatives of the lifted variables, \(\frac{\partial}{\partial t}(q, q^2) = (q_t, 2qq_t)\).
- Parameters
- states(n, k) ndarray
Native state variables.
- ddts(n, k) ndarray
Time derivatives of the native state variables. Each column
ddts[:, j]corresponds to the state vectorstates[:, j].
- Returns
- ddts(2n, k) ndarray
Time derivatives of the learning variables.