René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Changing Linestyle in plot window swaps some plotted lines","articleBody":"### Bug summary\r\n\r\nAfter creating a figure with multiple lines plotted using the plt.loglog() command, altering the linestyle in the plot window under Figure Options -\u003e Curves, results in some lines being swapped. \r\n\r\n### Code for reproduction\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\n\r\nNs = np.array([10, 20, 40, 80])\r\nerrors_fd = np.array([1.30069562e-17, 1.83972081e-17, 2.66824646e-16, 8.61976660e-16])\r\nerrors_dd = np.array([8.67886156e-12, 1.57381890e-11, 1.35584771e-08, 4.95264847e-06])\r\nerrors_operator = np.array([8.67888088e-12, 1.57381914e-11, 1.35584771e-08, 4.95264847e-06])\r\nerrors_rb = np.array([5.49503157e-06, 4.64897012e-06, 4.06345733e-06, 6.20409921e-06])\r\n\r\n\r\nplt.loglog(Ns, errors_fd, label=\"Finite Difference\", linestyle=\"-.\", marker=\".\")\r\nplt.loglog(Ns, errors_dd, label=\"Domain Decomposition\", linestyle=\"-\", marker=\"x\")\r\nplt.loglog(Ns, errors_operator, label=\"Exact Poincaré-Steklov\", linestyle=\"-.\", marker=\".\")\r\nplt.loglog(Ns, errors_rb, label=\"Reduced Basis\", linestyle=\"-.\", marker=\".\")\r\nplt.loglog(Ns, 1/Ns**2, label=\"Reference quadratic\")\r\nplt.xlabel(\"$N$ (number of disretisation points)\")\r\nplt.ylabel(\"$L^2$-error\")\r\nplt.grid()\r\nplt.legend()\r\nplt.title(\"$L^2$-error of numerical methods\")\r\n\r\nplt.show()\r\n```\r\n\r\n\r\n### Actual outcome\r\n\r\nOutcome plot:\r\n![image](https://user-images.githubusercontent.com/19654849/162746305-15b5019f-fa8b-4008-900d-a5ff041fa5ff.png)\r\n\r\nAfter changing the linestyle of the \"Domain Decomposition\" line to dotted:\r\n![image](https://user-images.githubusercontent.com/19654849/162746474-270985c7-6425-40f0-a460-4eda91e1878b.png)\r\n\r\n\r\n### Expected outcome\r\n\r\nI would expect that the \"Finite Difference\" line and the line of \"Domain Decomposition\" to not swap places in the graph. \r\n\r\n### Additional information\r\n\r\nI have edited figures before and this is the first time this bug occurs for me.\r\nI am on quite a new version of Python using the virtual environment provided by PyCharm Community Edition (Installed using Flatpak). I also run my code from within there. \r\n\r\n### Operating system\r\n\r\nFedora Workstation 35\r\n\r\n### Matplotlib Version\r\n\r\n3.5.1\r\n\r\n### Matplotlib Backend\r\n\r\nBackend QtAgg is interactive backend. Turning interactive mode on. Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway. Gtk-Message: 15:12:47.821: Failed to load module \"canberra-gtk-module\" Gtk-Message: 15:12:47.821: Failed to load module \"pk-gtk-module\" Gtk-Message: 15:12:47.821: Failed to load module \"canberra-gtk-module\" Gtk-Message: 15:12:47.822: Failed to load module \"pk-gtk-module\" QtAgg\r\n\r\n### Python version\r\n\r\nPython 3.9.9\r\n\r\n### Jupyter version\r\n\r\nNot installed\r\n\r\n### Installation\r\n\r\npip","author":{"url":"https://github.com/lucashc","@type":"Person","name":"lucashc"},"datePublished":"2022-04-11T13:16:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/22823/matplotlib/issues/22823"}