data-visualizationlisted

# Data Visualization ## When This Skill Applies - Selecting appropriate chart types for data presentations - Designing dashboard layouts for marketing reports - Creating visual data stories for stakeholders - Recommending visual encoding for different data types - Building infographics and data-heavy presentations ## Core Guidance ### 1. Chart Selection Matrix | Data Relationship | Chart Types | When to Use | |-------------------|------------|-------------| | Comparison | Bar, Column, Grouped Bar | Compare values across categories | | Trend over Time | Line, Area, Sparkline | Show changes over time periods | | Composition | Pie, Stacked Bar, Treemap | Show parts of a whole | | Distribution | Histogram, Box Plot, Violin | Show data spread and outliers | | Relationship | Scatter, Bubble, Heatmap | Show correlation between variables | | Ranking | Horizontal Bar, Lollipop | Rank items by value | | Flow | Sankey, Funnel | Show process or conversion flow | | Geographic | Map, Choropleth | Location-based data | ### 2. Chart Selection Decision Tree ``` What are you showing? ├── Comparison between items? │ ├── Few items (<7): Bar chart │ └── Many items (7+): Horizontal bar ├── Change over time? │ ├── Few series (<4): Line chart │ └── Cumulative: Stacked area ├── Parts of a whole? │ ├── Few parts (<6): Pie / Donut │ └── Many parts: Treemap ├── Distribution? │ ├── One variable: Histogram │ └── Comparison: Box plot ├── Relationship? │ ├── Two variables: Scatter │