René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"IndexError: index -1 is out of bounds for axis 0 with size 0","articleBody":"I get this:\r\n```\r\nTraceback (most recent call last):\r\n  File \"C:\\Users\\me\\PycharmProjects\\f\\control1.py\", line 17, in \u003cmodule\u003e\r\n    S = ct.step_info(sysdata=y_out2, T=T2)\r\n  File \"C:\\Users\\me\\PycharmProjects\\f\\venv\\lib\\site-packages\\control\\timeresp.py\", line 1614, in step_info\r\n    settled = np.where(\r\nIndexError: index -1 is out of bounds for axis 0 with size 0\r\n```\r\nFrom this: (just a simple integrator TF)\r\n```python\r\nimport control as ct\r\nimport numpy as np\r\n\r\nnum = [0,5]\r\nden = [1,0]\r\n\r\nH = ct.TransferFunction(num, den)\r\n\r\nt = np.arange(start=0, stop=2, step=1/120)\r\n\r\nT2, y_out2 = ct.timeresp.impulse_response(sys=H, T=t)\r\npyplot.figure(1)\r\npyplot.plot(T2, y_out2)\r\npyplot.grid(True)\r\npyplot.show(block=False)\r\nS = ct.step_info(sysdata=y_out2, T=T2)\r\n\r\npyplot.show()\r\n```\r\n\r\nControl v0.10.0\r\nNumpy 1.26.4\r\nScipy 1.14.0","author":{"url":"https://github.com/NikolaiVChr","@type":"Person","name":"NikolaiVChr"},"datePublished":"2024-06-27T08:49:00.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/1014/python-control/issues/1014"}