Theme River Chart

🌊 Theme River Chart – Visualize Flowing Trends Over Time

The Theme River Chart in Lowcoder is designed to display the evolution of multiple categories over time, using a flowing, layered stream of color. Each "river" represents a topic, event, or value stream — rising and falling along a shared timeline — making it perfect for showing how topics emerge, overlap, and fade.

📆 Ideal Use Cases

• News or media timelines: Track the rise and fall of trending topics

• Social conversations: Visualize volume of discussions over time

• Multi-series comparisons: See how categories shift in relation to each other

• Sentiment or event tracking: Watch how themes surge during campaigns

🧩 Sample Data Format

Each data point combines a timestamp, a category, and a value:

[
  { "date": "2023-01-01", "name": "Product A", "value": 20 },
  { "date": "2023-01-01", "name": "Product B", "value": 35 },
  { "date": "2023-01-02", "name": "Product A", "value": 25 }
]

The chart automatically stacks values by category and time.

⚙️ Configuration Highlights

• Chart Type: Drag “Theme River Chart” from the components section onto Editor's View

• X-Axis: Typically a time series (date or timestamp)

• Series Field: Category name (e.g., product, topic, segment)

• Flowing Area: The vertical thickness represents the value at that time

🎨 Styling & Customisation

• Assign distinct colors per category for visual clarity

• Control label visibility, smoothness, and area curvature

• Use ECharts JSON config to animate flows, adjust tooltips, or highlight interactions

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