vega

Generate Vega and Vega-Lite visualizations from structured JSON or tabular data.

3.1k|179|Updated Jan 31, 2026
One-click install
npx skills add https://github.com/markdown-viewer/skills --skill vega
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vega
Source: https://github.com/markdown-viewer/skills/tree/main/vega
Command: npx skills add https://github.com/markdown-viewer/skills --skill vega

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Make it easy to turn structured JSON or tabular data into accurate, publication-quality charts directly inside Markdown, eliminating trial-and-error with schemas, encodings, and formatting.

Core Features & Use Cases

  • Declarative Vega-Lite patterns for bar, line, scatter, area, heatmap, histogram, faceting, layered and dual-axis charts.
  • Programmatic Vega examples for radar charts, word clouds, and advanced mark layouts, plus color schemes, transforms, formatting, and tooltip configuration for interactive reports.
  • Use Cases: quick exploratory analysis in notebooks, embedding interactive charts in documentation, producing dashboard-ready visuals for stakeholder reports.

Quick Start

Generate a Vega-Lite bar chart that visualizes monthly sales using fields month and sales and the Vega-Lite v5 schema.

Frequently Asked Questions about vega

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate interactive charts from JSON data?

You can generate interactive charts from JSON data by applying declarative Vega-Lite schemas to map structured fields to visual encoding channels. This approach renders publication-quality visualizations directly from tabular or JSON inputs without manual SVG coding.

When do I need Vega-Lite versus Vega for data visualization?

Use Vega-Lite for declarative statistical charts like bar, line, scatter, and area visualizations. Choose Vega when you need programmatic layouts for advanced marks like radar charts or word clouds that require custom transform pipelines and lower-level layout control.

What's the best way to embed interactive visualizations in Markdown documentation?

The best way to embed interactive visualizations in Markdown is by generating valid Vega-Lite JSON specifications with proper field mappings, color scales, and tooltip configurations. This renders dashboard-ready charts directly inside your documentation without external libraries.

Can I create a word cloud from structured JSON?

Yes, you can create a word cloud from structured JSON by applying programmatic Vega schemas. This approach uses advanced Vega marks and transform pipelines to calculate text layouts, bypassing the standard declarative Vega-Lite syntax used for simpler charts.

Why does my Vega-Lite chart fail to render correct fields?

Vega-Lite chart rendering fails when JSON formatting is invalid or field mappings are not strictly case-sensitive. Enforcing valid Vega-Lite schemas, verifying exact field name casing, and ensuring correct JSON formatting resolves these structural encoding errors.

Does this approach support heatmap and radar visualizations for reporting?

Yes, this approach supports heatmap and radar visualizations for reporting. It applies declarative Vega-Lite patterns for heatmaps and programmatic Vega examples for radar charts, complete with color schemes and tooltip configurations for interactive stakeholder reports.