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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`rlocus` with `kvect` argument doesn't compute good limits","articleBody":"Example:\r\n\r\n```python\r\nimport control as ct\r\ng = ct.tf([1,2], [1,2,10])\r\nkvect = ct.rlocus(g)[1]\r\nplt.figure()\r\nct.rlocus(g, kvect=kvect);\r\n```\r\n\r\nresult:\r\n\r\n![image](https://user-images.githubusercontent.com/110974/201471371-e9691f6e-216e-448d-b850-d3007ba1d853.png)\r\n\r\n![image](https://user-images.githubusercontent.com/110974/201471403-d579e3f2-705d-46cf-a5f8-09f201024e67.png)\r\n\r\nI'd expect these two to look the same.\r\n\r\nThis is because axis limits are only calculated when argument kvect is None:\r\n\r\n```python\r\n    if kvect is None:\r\n        start_mat = _RLFindRoots(nump, denp, [1])\r\n        kvect, mymat, xlim, ylim = _default_gains(nump, denp, xlim, ylim)\r\n    else:\r\n        start_mat = _RLFindRoots(nump, denp, [kvect[0]])\r\n        mymat = _RLFindRoots(nump, denp, kvect)\r\n        mymat = _RLSortRoots(mymat)\r\n```","author":{"url":"https://github.com/roryyorke","@type":"Person","name":"roryyorke"},"datePublished":"2022-11-12T11:16:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/787/python-control/issues/787"}