lift_ddts()

Contents

lift_ddts()#

PolynomialLifter.lift_ddts(states, ddts)[source]#

Get the time derivatives of the lifted variables, \((q_t, 2qq_t, ...)\).

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 vector states[:, j].

Returns:

ddts(num_variables * n, k) ndarray: Time derivatives of the learning variables.