René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Plotting three points using scatter results in wrong color - 1.4.3","articleBody":"I'm running this on Windows 10 / Anaconda Python 3.4.3 / jupyter iPython 4\r\n\r\nHere's some repro code:\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\n\r\nfig = plt.figure(1)\r\nax = plt.axes([0., 0., 1., 1.])\r\n\r\npoints = np.random.rand(2,2) # plot 2 points, totally fine\r\nax.scatter(points[0], points[1], c=[1, 0, 0],  s=200)\r\npoints = np.random.rand(2,3) # plot 3 points, hopelessly broken\r\nax.scatter(points[0], points[1], c=[0, 1, 0], s=200)\r\npoints = np.random.rand(2,3) # plot 3 points with string color, totally ok\r\nax.scatter(points[0], points[1], c='g', s=200)\r\npoints = np.random.rand(2,4) # plot 4 points, totally fine\r\nax.scatter(points[0], points[1], c=[0, 0, 1], s=200)\r\nplt.show()\r\n```\r\n\r\nHere's what I get:\r\n\r\n![download 1](https://cloud.githubusercontent.com/assets/704823/10875507/0e2d8a62-80e8-11e5-9a6a-63bd7c144650.png)\r\n\r\nAs you can see, plotting 2, 4, or any other number of points using `ax.scatter` is fine, but graphing 3 points while using RGB color array results in two points as black, and one point as white, instead of using the specified color.\r\n\r\nHere's an example on a real dataset. As you can see, it also messes with the legend color. It's hard to diagnose the issue because it's completely non-obvious that the number of points plotted is what triggers the bug.\r\n![download 2](https://cloud.githubusercontent.com/assets/704823/10875511/17ee50cc-80e8-11e5-81da-d02cf80d489c.png)\r\n\r\nI was pulling my hair out for awhile until I realized that the problem only manifested itself on series that had 3 members.\r\n","author":{"url":"https://github.com/liujimj","@type":"Person","name":"liujimj"},"datePublished":"2015-11-02T06:31:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/5377/matplotlib/issues/5377"}