control.forced_response argument T

[forgi86]

In version 0.9:

• For a discrete-time system , the time vector should be optional in the forced response (as stated in the documentation).
  However, this code does not work for me:

sys = control.drss(states=1, outputs=1, inputs=1)
u = np.random.randn(1000)
control.forced_response(sys, U=u)

• Also, the default value of return_x is stated to be True in the docstring, but it is None (False?) in the code.

[bnavigator]

• For a discrete-time system , the time vector should be optional in the forced response (as stated in the documentation).

Automatic timevector calculation only works if the sys has dt specified. Should be stated more explicitly in the documentation and a better error message should be provided.

Plus, there is a bug in drss. It should return a system with dt=True, but the returned system has dt=0.

• Also, the default value of return_x is stated to be True in the docstring, but it is None (False?) in the code.

Agreed, this is a bug an error in the documentation. Since 0.9.0 the default value of config.defaults['forced_response.return_x'] is False.