10a0696176
Each learn() call now updates a 3×3 neighborhood (center w=1.0, cardinal w=0.3, diagonal w=0.1). count field changed to float64 to support fractional weights. Fills grid ~5× faster and eliminates one-sided interpolation at bin boundaries. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>