René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Norms need scales for good colorbars...","articleBody":"Right now some color norms have accompanying scales, which allows their colorbars to have first-class scales.  But some do not...\r\n\r\n- `LogNorm`: `log`\r\n- `PowerNorm`: no scale\r\n- `TwoSlopeNorm`: no scale\r\n- `BoundaryNorm`: shouldn't have a scale\r\n\r\nInstead of inferring the first-class scale, I'd suggest we add a new property: `norm._scale` so that colorbar does not have to guess the scale.  This should be a string so that it will only call registered scales, and it should be `None` when no scale is defined.  \r\n\r\nIf its `None`, then colorbar will use the old default way of setting the scale. Otherwise it will set the scale using `ax.set_yscale(norm._scale)`.  \r\n\r\nWe *probably* don't want the user to set this - if they want to change the colorbar scale, they can simply use the normal `ax.set_yscale` directly.\r\n","author":{"url":"https://github.com/jklymak","@type":"Person","name":"jklymak"},"datePublished":"2020-01-30T18:28:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/16375/matplotlib/issues/16375"}