Fan · Explore intervals

Zoom changes the frame without recalculating or assigning probabilities.

Use nested intervals when the source already defines the central estimate and coverage. The chart does not forecast, infer confidence or create probabilities.

Supply 1–6 bands with stable IDs, labels and strictly increasing coverage between zero and one. Up to 1024 points use category IDs, finite numbers or UTC timestamps. Each known interval must contain the central value and be nested inside wider bands. Null pairs are unknown; omitted bands are not configured; zero is a real value.

Configure axes, references, central markers, band colours, legend, point/shared detail and viewport. Shared detail groups only the same original X coordinate. Stacking, independently fitted bounds and a log scale are unavailable.

• Estimate and uncertainty
• Coincident bounds
• Incomplete observations
• Uncertainty over time
• Explore intervals
• Longer series

• Introduction
• Installation
• Component API
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• Accessibility
• Testing
• Performance
• Status and compatibility
• Ecosystem
• Demos