observablehq / observablehq/plot

Automatic margins based on tick label length

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enhancement
Dominant language
HTML
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Description

A Plot could be internally composed in a harmonious and adaptive way, taking into account the actual bounding box of tick labels and axis titles for example, rather than having you to manually specify margins.

Here I need to enter a guestimate marginLeft:110 to accomodate labels width:

image

A manual specification of margins is not robust: if unit or data change, or the font family/size used for the axes, overlaps may occur, or unsightly gaps may appear.

Note: ggplot2 and vega-lite automatically handle margins/padding inferred from axis (and legends) bounding boxes.

Plus, an option comparable to labelOverlap in vega-lite would allow the density of tick labels on a numerical or temporal axis to be managed harmoniously, avoiding any overlap.

PS: Plot is a great library, very intellectually stimulating, and the 21 beautifully written articles in the https://observablehq.com/collection/@observablehq/plot collection should be read by all data scientists!

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First steps

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Research direction

The issue names no files, tests, or entry points; start by locating Plot’s margin, axis, and tick-label layout implementation. Done would mean margins adapt to label and title bounds, with numerical and temporal tick labels avoiding overlap without manual guesses.

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

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