observablehq / observablehq/plot
Plot.scale(…) ignores the transform option
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bug
- Dominant language
- HTML
- Stars
- 5.4k
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- 244
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Description
E.g., the transform option is ignored here:
Plot.scale({
color: {
domain: d3.range(9),
range: scheme,
transform: ([a, b]) => 3 * a + b,
unknown: "#ccc"
}
})
This produces a different result than:
Plot.plot({
color: {
domain: d3.range(9),
range: scheme,
transform: ([a, b]) => 3 * a + b,
unknown: "#ccc"
}
}).scale("color")
Ref. https://observablehq.com/@observablehq/plot-bivariate-choropleth
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
Start at the Plot.scale entry point and compare its handling of the color transform option with Plot.plot(...).scale("color"), using the reproducing examples in the issue. The work is done when both entry points produce the same transformed color scale for the given domain, range, and unknown value.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- d3js, javascript
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100