Icicle / Flame charts

[nicolaskruchten]

We could use a new trace type for icicle charts, basically sunbursts that aren't circular but instead grow either up (flame chart) or down (like physical icicles) or sideways (good for text!).

We'd want the API and capabilities (animation, uniformtext etc) to be very similar to sunburst and we might even want to grab the pathbar from treemap. We'll want a direction attribute to control the orientation.

[pgkirsch]

Sibling issue in the plotly.py repo: plotly/plotly.py#2878 :)

[nicolaskruchten]

This issue has been tagged with NEEDS SPON$OR

A community PR for this feature would certainly be welcome, but our experience is deeper features like this are difficult to complete without the Plotly maintainers leading the effort.

Sponsorship range: $12k-$17k

What Sponsorship includes:

• Completion of this feature to the Sponsor's satisfaction, in a manner coherent with the rest of the Plotly.js library and API
• Tests for this feature
• Long-term support (continued support of this feature in the latest version of Plotly.js)
• Documentation at plotly.com/javascript
• Possibility of integrating this feature with Plotly Graphing Libraries (Python, R, F#, Julia, MATLAB, etc)
• Possibility of integrating this feature with Dash
• Feature announcement on community.plotly.com with shout out to Sponsor (or can remain anonymous)
• Gratification of advancing the world's most downloaded, interactive scientific graphing libraries (>50M downloads across supported languages)

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