@@ -1648,7 +1648,9 @@ def test_interconnect_unused_output():
16481648outputs = ['u' ],
16491649name = 'k' )
16501650
1651- with pytest .warns (UserWarning ,match = r"Unused output\(s\) in InterconnectedSystem:" )as record :
1651+ with pytest .warns (
1652+ UserWarning ,
1653+ match = r"Unused output\(s\) in InterconnectedSystem:" )as record :
16521654h = ct .interconnect ([g ,s ,k ],
16531655inputs = ['r' ],
16541656outputs = ['y' ])
@@ -1679,13 +1681,17 @@ def test_interconnect_unused_output():
16791681pytest .fail (f'Unexpected warning:{ r .message } )
16801682
16811683# warn if explicity ignored output in fact used
1682- with pytest .warns (UserWarning ,match = r"Output\(s\) specified as ignored is \(are\) used:" ):
1684+ with pytest .warns (
1685+ UserWarning ,
1686+ match = r"Output\(s\) specified as ignored is \(are\) used:" ):
16831687h = ct .interconnect ([g ,s ,k ],
16841688inputs = ['r' ],
16851689outputs = ['y' ],
16861690ignore_outputs = ['dy' ,'u' ])
16871691
1688- with pytest .warns (UserWarning ,match = r"Output\(s\) specified as ignored is \(are\) used:" ):
1692+ with pytest .warns (
1693+ UserWarning ,
1694+ match = r"Output\(s\) specified as ignored is \(are\) used:" ):
16891695h = ct .interconnect ([g ,s ,k ],
16901696inputs = ['r' ],
16911697outputs = ['y' ],
@@ -1697,3 +1703,25 @@ def test_interconnect_unused_output():
16971703inputs = ['r' ],
16981704outputs = ['y' ],
16991705ignore_outputs = ['v' ])
1706+
1707+ def test_nonuniform_timepts ():
1708+ """Test non-uniform time points for simulations"""
1709+ sys = ct .LinearIOSystem (ct .rss (2 ,1 ,1 ))
1710+
1711+ # Start with a uniform set of times
1712+ unifpts = [0 ,1 ,2 ,3 ,4 ,5 ,6 ,7 ,8 ,9 ,10 ]
1713+ uniform = [1 ,2 ,3 ,2 ,1 ,- 1 ,- 3 ,- 5 ,- 7 ,- 3 ,1 ]
1714+ t_unif ,y_unif = ct .input_output_response (sys ,unifpts ,uniform )
1715+
1716+ # Create a non-uniform set of inputs
1717+ noufpts = [0 ,2 ,4 ,8 ,10 ]
1718+ nonunif = [1 ,3 ,1 ,- 7 ,1 ]
1719+ t_nouf ,y_nouf = ct .input_output_response (sys ,noufpts ,nonunif )
1720+
1721+ # Make sure the outputs agree at common times
1722+ np .testing .assert_almost_equal (y_unif [noufpts ],y_nouf ,decimal = 6 )
1723+
1724+ # Resimulate using a new set of evaluation points
1725+ t_even ,y_even = ct .input_output_response (
1726+ sys ,noufpts ,nonunif ,t_eval = unifpts )
1727+ np .testing .assert_almost_equal (y_unif ,y_even ,decimal = 6 )