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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"control.matlab.lsim does not work for systems of order \u003e 1","articleBody":"When calling the control.matlab.lsim with a higher-order system (at least 2x2 matrices), there is a prompt:\r\n```\r\nValueError: Parameter ``T`` must have same elements as the number of columns in input array ``U`` \r\n```\r\nInverting U or T does not help. Instead, it prompts a different error with matrix multiplication.\r\nIt works properly when calling control.timeresp.forced_response directly, with the \"transpose\" flag set to false. \r\nThe error is likely due to the transpose flag, and its implementation throughout the declaration of control.timeresp.forced_response\r\n\r\n```\r\nimport numpy as np\r\nimport control\r\nimport control.matlab\r\n\r\ntime = np.linspace(0.0, 511.0e-6, 512)\r\nDAC = np.sin(time)\r\nADC = np.cos(time)\r\n\r\ninput_Kalman = np.transpose(np.concatenate(([[DAC]], [[ADC]]), axis=1)[0])\r\nAf = [[0.45768416, -0.42025511], [-0.43354791, 0.51961178]]\r\nBf = [[2.84368641, 52.05922305], [-1.47286557, -19.94861943]]\r\nCf = [[1.0, 0.0], [0.0, 1.0]]\r\nDf = [[0.0, 0.0], [0.0, 0.0]]\r\nss_Kalman = control.ss(Af, Bf, Cf, Df, 1.0e-6)\r\nx_est, _, _ = control.matlab.lsim(ss_Kalman, input_Kalman, time)\r\n```","author":{"url":"https://github.com/jonschlipf","@type":"Person","name":"jonschlipf"},"datePublished":"2022-08-24T19:06:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/764/python-control/issues/764"}