stackR transform? #197
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… by number of cylinders The bins are sorted by decreasing r, so that they are all visible. The example would benefit from stackR (#197). It could also benefit from a strategy to create missing values for the line, so that it's broken when there are no data. However, it won't work with an approach such as "return empty bins" (#495), because returning empty bins will not create the *z* values for each and every category, which would be necessary if we wanted to create broken lines. This shows that a generic foolproof solution to #351 will require much more than #495 (and #489 and #491 are not better in that regard).
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* This example plot computes the median of cars' economy (mpg), grouped by number of cylinders The bins are sorted by decreasing r, so that they are all visible. The example would benefit from stackR (#197). It could also benefit from a strategy to create missing values for the line, so that it's broken when there are no data. However, it won't work with an approach such as "return empty bins" (#495), because returning empty bins will not create the *z* values for each and every category, which would be necessary if we wanted to create broken lines. This shows that a generic foolproof solution to #351 will require much more than #495 (and #489 and #491 are not better in that regard). * Update test/plots/cars-mpg.js Co-authored-by: Mike Bostock <[email protected]> * Update test/plots/cars-mpg.js Co-authored-by: Mike Bostock <[email protected]> * zero, not filter * group, not bin * remove console.log * stroke, not fill Co-authored-by: Mike Bostock <[email protected]>
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I could see a stackR transform which takes an r (radius) channel in and produces r1 and r2 output channels, which you would use in conjunction with an annulus type mark. Maybe the dot mark should allow r1 and r2 input channels and have similar behavior to barY’s y, y1, and y2 channels. The sqrt transform should ensure that the rings have area proportional to value.
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