René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Color maps from function","articleBody":"### Problem\r\n\r\nWould be nice if we could just pass a function as a cmap, and matplotlib would just query it to get a color from a value.\r\n\r\nexample of usage:\r\n```python\r\nfrom colorsys import hsl_to_rgb\r\nimport matplotlib.pyplot as plt\r\n\r\ny = ...  # some data for an histogram\r\ncmap = lambda x: hsl_to_rgb(x, .9, .5)**2\r\nplt.hist(y, cmap=cmap)\r\n```\r\n\r\n### Proposed Solution\r\n\r\nI don't know how realistic this is but I've just never seen it even suggested when googling.  \r\nIt certainly feels reasonable to me but I can't tell because I don't know much about the implementation.  \r\nIf this is not feasible at least this would set a record for future google queries...","author":{"url":"https://github.com/Inspirateur","@type":"Person","name":"Inspirateur"},"datePublished":"2021-01-08T08:47:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/19258/matplotlib/issues/19258"}