cc85f495cb738667a27d5184901fc9b3f620fe5b,scipy/signal/tests/test_ltisys.py,Test_freqresp,test_from_state_space,#Test_freqresp#,394

Before Change

        // the shape of A.
        A = np.array([[1.0, 2.0], [3.0, 4.0]])
        B = np.array([[5.0], [6.0]])
        C = np.array([[7.0, 8.0]])
        D = np.array([[9.0]])
        system = lti(A, B, C, D)
        w, mag, phase = bode(system, n=2)

After Change

        B = np.array([[0.0],[0.0],[1.0]])
        C = np.array([[1.0, 0.0, 0.0]])
        D = np.array([[0.0]])
        with warnings.catch_warnings():
            warnings.simplefilter("ignore", BadCoefficients)
            system = lti(A, B, C, D)
        w, H = freqresp(system, n=100)
        expected_magnitude = np.sqrt(1.0 / (1.0 + w**6))
        assert_almost_equal(np.abs(H), expected_magnitude)

Instances