function xdot = xdot_attas_reg(t, x, u, param)

% Function to compute the state derivatives (i.e., RHS of state equations) 
% test_case = 23 and 24
                  -- Aerodynamic force and moment coefficients, multiple time segments (NZI=3),
%                   longitudinal and lateral-directional motion
%                   states  - no state variables for regression analysis
%                   outputs - V, alpha, beta, phi, theta, psi, h
%                   inputs  - ax, ay, az, p, q, r, (pdot, qdot, rdot)
% This is a dummy function for regression analysis. (Even this will not be required, 
% when the function name is defined as empty, i.e., state_eq = [] in mDefCasexx.m

% State variables

return
% end of function