René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Need helps to figure out the Error and how to fix it ","articleBody":"I am running the example from https://github.com/python-control/python-control/blob/master/examples/kincar-flatsys.py. And I am getting an error message as below,\r\n\r\n\r\n---------------------------------------------------------------------------\r\nValueError                                Traceback (most recent call last)\r\n[\u003cipython-input-50-3158d2b11897\u003e](https://localhost:8080/#) in \u003cmodule\u003e()\r\n    130 # Simulation the open system dynamics with the full input\r\n    131 t, y, x = ct.input_output_response(\r\n--\u003e 132     vehicle_flat, T, ud, x0, return_x=True)\r\n    133 \r\n    134 # Plot the open loop system dynamics\r\n\r\n2 frames\r\n[/usr/local/lib/python3.7/dist-packages/control/timeresp.py](https://localhost:8080/#) in _process_labels(labels, signal, length)\r\n    681     # Make sure the signal list is the right length and type\r\n    682     if len(labels) != length:\r\n--\u003e 683         raise ValueError(\"List of %s labels is the wrong length\" % signal)\r\n    684     elif not all([isinstance(label, str) for label in labels]):\r\n    685         raise ValueError(\"List of %s labels must all  be strings\" % signal)\r\n\r\nValueError: List of output labels is the wrong length**\r\n\r\nThe program is running in google Colab environment with python version 3.7.\r\nYour help would be much appreciated.","author":{"url":"https://github.com/shiling2007","@type":"Person","name":"shiling2007"},"datePublished":"2022-04-24T02:43:31.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/727/python-control/issues/727"}