Controls
RMSE
—
R²
—
3D Fit Geometry
Simple y = β₀ + β₁x₁
Drag to rotate · Scroll to zoom · Right-click to pan
Legend
Orange/Blue — data (y)
White — prediction (ŷ)
Red lines — residuals
Green mesh — fit surface
Formula
// Simple linear
y = β₀ + β₁·x₁
y = β₀ + β₁·x₁
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Metrics Guide
RMSE — average error magnitude. Lower is better.
R² — variance explained. Closer to 1.0 is better. Negative = worse than a flat mean line.