observablehq / observablehq/plot

Extended intervals?

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enhancement question
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Description

A technique demonstrated here to extend an interval’s range from the day before the first day to the day after the last, allowing to create a "complete" area. I come across this frustrating situation once in a while, and wonder if we could have a built-in option for this. Maybe Plot.extendInterval("day")? Or, we don't, but it would be nice instead to expose Plot.interval with an argument such as "3 days" or 1, that returns an object with {floor, offset, range}, so we can tweak that programmatically?

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Research direction

No file or test is named. Start with the linked Observable example and inspect the existing Plot.interval API; compare the proposed built-in extension with exposing floor, offset, and range. Done means selecting and implementing a clear API for extending an interval from the day before its first day to the day after its last.

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Assessment

Domain
data-visualization
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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