observablehq / observablehq/plot

Automatic inference of SI units

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enhancement
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Description

It’d be nice if there were a transform: "si" or units: "si" scale option that automatically computed the appropriate SI units based on the associated channel values, and used this to apply a scale transform and append the appropriate units to the scale label. Ref. https://github.com/observablehq/plot/issues/1612#issuecomment-1685075869, where the appropriate units are 1e6 (micros) and the scale label should have “ (µ)” appended.

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the existing scale-option and associated channel-value handling, then review the referenced discussion for the expected micros example. The work is done when an SI option infers the appropriate unit transform and appends the matching SI symbol to the scale label, with coverage for the documented case.

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
Mostly clear
Newbie friendliness
35/100

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