René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Polar 2.0 open items","articleBody":"Followup issue of https://github.com/plotly/plotly.js/pull/2200 and the on-par polar [milestone](https://github.com/plotly/plotly.js/milestone/2).\r\n\r\n------\r\n\r\n### Features we could easily add\r\n- [ ] radial and angular axis `spikes`\r\n- [ ] support for `radialaxis.side: 'center'` to display radial axis labels along invisible radial axis lines\r\n- [x] radial axis _hole_ (similar to pie `hole`, mpl [example](https://github.com/matplotlib/matplotlib/issues/4217)) - done in https://github.com/plotly/plotly.js/pull/2977\r\n- [x] support square grid lines for category angular axes [example](https://matplotlib.org/_images/radar_chart.png) - done in https://github.com/plotly/plotly.js/pull/2739\r\n- [ ] some way to _snap_ to NSEW corners during angular drag\r\n- [ ] way to activate radial (and possibly angular down the road) autorange on double click (i.e. implement `doubleClick: 'autosize'` config option\r\n- [ ] radial (and angular?) axis zeroline\r\n- [ ] polar (r,theta) data-referenced annotations\r\n- [ ] trace-specified and radial-axis calendars\r\n- [ ] make polar respect `gd._context.showAxisDragHandles`? \r\n\r\n### Potential features that require some thought\r\n\r\n- [x] How to replace legacy polar's `area` trace type? I'd vote for replacing it with `polarbar` or `wedge`. Most of the `bar` logic could be reused here. **Moved to -\u003e** https://github.com/plotly/plotly.js/issues/2810 **Done in -\u003e** https://github.com/plotly/plotly.js/pull/2954\r\n- How to replace legacy polar's (r,t) `bar` traces? I'd vote simply removing them, unless someone out there finds them useful.\r\n- What to do with `r \u003c 0` values? In #2200, they are simply dismissed, but perhaps we should add an option to plot them on the opposite side of the origin. See https://github.com/plotly/plotly.js/pull/2200#commitcomment-26416872\r\n- Date angular axes. See examples in https://github.com/plotly/plotly.js/pull/2200#discussion_r156397924) and some considerations in the last part of https://github.com/plotly/plotly.js/commit/1e81039384ebf89de376c3ddd004d0f103278fa6#r26653662 **Moved to --\u003e** https://github.com/plotly/plotly.js/issues/4379\r\n- Should we allow `angularaxis.period` to be less then the number of categories on categorical angular axes? See https://github.com/plotly/plotly.js/pull/2200#discussion_r161143299\r\n- [x] Maybe add `r0`, `dr`, `theta0` and `dtheta`. For the `theta` pair, it might be tricky to find a _correct_ default the everyone likes. **Done in -\u003e** https://github.com/plotly/plotly.js/pull/2895\r\n- Add another zoombox mode? Perhaps a pixel-based zoom using `polar.x`, `polar.y`, `polar.zoom` scalars to describe it? See https://github.com/plotly/plotly.js/pull/2200#issuecomment-351127938\r\n- scatterpolar (r,theta?) error bars \r\n- Properly clip `scatterpolargl` line segments","author":{"url":"https://github.com/etpinard","@type":"Person","name":"etpinard"},"datePublished":"2018-01-16T21:50:42.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/2255/plotly.js/issues/2255"}