scale-reference

Comprehensive guide to all d3 scale types with examples and use cases.

Skills
Creative design
0

What it does and how to use it

A skill that teaches Claude Code to do creative design tasks well. It is packaged knowledge the model uses whenever it is relevant.

Install the skill (command above).
In Claude Code, describe what you need - the skill turns on by itself when the context fits.
No commands to memorize: you talk in plain language and the skill does the rest.

Install (Claude Code)

mkdir -p .claude/skills/scale-reference && curl -fsSL https://doutorai.pt/data/lib/skills__scale-reference.md -o .claude/skills/scale-reference/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# D3.js Scale Reference

Comprehensive guide to all d3 scale types with examples and use cases.

## Continuous scales

### Linear scale

Maps continuous input domain to continuous output range with linear interpolation.

```javascript
const scale = d3.scaleLinear()
  .domain([0, 100])
  .range([0, 500]);

scale(50);  // Returns 250
scale(0);   // Returns 0
scale(100); // Returns 500

// Invert scale (get input from output)
scale.invert(250); // Returns 50
```

**Use cases:**
- Most common scale for quantitative data
- Axes, bar lengths, position encoding
- Temperature, prices, counts, measurem

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