apply()# ConstantOperator.apply(state=None, input_=None)[source]# Apply the operator to the given state / input: \(\Ophat_{\ell}(\qhat,\u) = \chat\). Parameters: state(r,) ndarray or NoneState vector. input_(m,) ndarray or NoneInput vector (not used). Returns: out(r,) ndarray\(\chat\).