observablehq / observablehq/plot
stacking segments
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enhancement
- Dominant language
- HTML
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Description
The stack transform could be extended from point bases to segment bases, where something extends from start to end.
Various kinds of outputs can be generated, depending on what we want to achieve:
- a single value y for each segment (piling up straight segments into "lanes")
- a series of (x, y) values for each segment (typically for a burndown chart)
- a series of (x, y) values, with a reducer such as "max" or "sum" (typically for a coverage chart)
Prior art:
- “canadian wildfires II” (unpublished notebook, see lanes, first image below)
- https://observablehq.com/@tmcw/github-burndown
- https://genomespy.app/docs/grammar/transform/coverage/
lanes
coverage
burndown
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No repository files, tests, or entry points are named. Start by reviewing the existing stack transform and the linked prior art, then clarify which segment-based outputs and reducers are required before defining completion criteria.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- d3
- Domain
- data-visualization
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100