René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"step_info undershoot must be \"Undershoot: Percentage of undershoot\"","articleBody":"The function doc:\r\n\r\n\u003e https://github.com/python-control/python-control/blob/92de12d48cadd62b7428f1868ef7508930c9a9d5/control/timeresp.py#L774\r\n\r\nthe code calculate undershoot as:\r\n\u003ehttps://github.com/python-control/python-control/blob/92de12d48cadd62b7428f1868ef7508930c9a9d5/control/timeresp.py#L818\r\n\r\nAn example:\r\n\r\n```\r\nimport numpy as np              # NumPy library\r\nimport matplotlib.pyplot as plt\r\nimport control as ctrl  # Name: control Version: 0.8.4\r\n\r\nsys3 = ctrl.tf([-1, 1],[1,1,1])\r\nctrl.step_info(sys3)\r\ntime,yout=ctrl.step_response(sys3)\r\nplt.figure()\r\nplt.plot(time,yout)\r\n\r\n```\r\n{'RiseTime': 1.197344248356904,\r\n 'SettlingTime': 6.631445067822853,\r\n 'SettlingMin': 0.8878785981432115,\r\n 'SettlingMax': 1.2087112656708903,\r\n 'Overshoot': 23.04582827419207,\r\n **'Undershoot': -0.2791703847438639,**\r\n 'Peak': 1.2087112656708903,\r\n 'PeakTime': 4.236756571109045,\r\n 'SteadyStateValue': 0.9823260833983173}\r\n\r\n![Figure_1](https://user-images.githubusercontent.com/21680839/110949000-d7581c00-8320-11eb-93c3-643a9f554d3c.png)\r\n\r\n","author":{"url":"https://github.com/juanodecc","@type":"Person","name":"juanodecc"},"datePublished":"2021-03-12T13:59:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/565/python-control/issues/565"}