peter-stuart-turner opened a new pull request #4871: Add spider/radar chart URL: https://github.com/apache/incubator-superset/pull/4871 Added a visualization: Spider/Radar chart (using D3) It has options to 'group by' selected columns, and compare the categories on a single metric for all of those columns. The comparisons are shown on the axis of the graph, each axis represents a category. There is also functionality to set the max value of the graph (outermost circle), this 'stretches' the axes on which the metric's values are plotted. I have not added any tests, as I am unsure of what I need to test, and how I need to do this - more than happy to add, just need some help there. Credit to Nadieh Bremer for the original JS and CSS, https://www.visualcinnamon.com (picture below) <img width="657" alt="screen shot 2018-04-24 at 1 45 53 pm" src="https://user-images.githubusercontent.com/34794246/39185017-f124b8b2-47c5-11e8-9bfd-693de6e678e1.png";>
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