# Advanced Data Visualization

> Chart.js/D3.js expertise for interactive dashboards, complex charts, and political data visualization

- Skill: `hack23/advanced-data-visualization` (Agent Skill)
- Install (CLI): `npx skillmds@latest add hack23/advanced-data-visualization`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hack23/advanced-data-visualization/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: CC-BY-4.0
- Author: Hack23 (https://skillmd.com/u/hack23)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/hack23/advanced-data-visualization

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# Advanced Data Visualization Skill


## 🔴 AI FIRST Quality Principle

> **Apply the AI FIRST principle: never accept first-pass quality. Minimum 2 iterations. Read all output, improve every section. No shortcuts.**

## Purpose
Expert knowledge in creating interactive, accessible data visualizations using Chart.js and D3.js for complex political intelligence data.

## Core Principles
1. **Accessibility First** - WCAG 2.1 AA compliant
2. **Responsive Always** - Mobile-first design
3. **Performance Critical** - Optimize for large datasets
4. **Clarity Over Complexity** - Clear data storytelling
5. **Interactive Insight** - Enable user exploration

## Enforces
- Chart.js bar/line/scatter/pie charts
- D3.js network/force/geo diagrams
- Interactive tooltips and legends
- Responsive chart design
- Screen reader compatibility
- Performance optimization (lazy loading, canvas vs SVG)

## Chart Types
- **Election Forecasting**: Confidence intervals, seat predictions
- **Risk Heat Maps**: Multi-dimensional risk scoring
- **Network Diagrams**: Influence and power structures
- **Time Series**: Historical trends (50+ years)
- **Scatter Plots**: Correlation and clustering
- **Sankey Diagrams**: Coalition flows

## When to Use
- Creating interactive dashboards
- Visualizing complex datasets
- Building political intelligence displays
- Network/influence mapping
- Time series analysis

## References
- [Chart.js Documentation](https://www.chartjs.org/)
- [D3.js Gallery](https://observablehq.com/@d3/gallery)
- [WCAG 2.1 Guidelines](https://www.w3.org/WAI/WCAG21/quickref/)

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**Version**: 1.0 | **Last Updated**: 2026-02-06 | **Category**: UI/UX & Design