Degree Use 2-10 depending on the number of selected points.

Harmonics Window (points) Per-frequency decay (λ per harmonic) Regularization (0-0.9) Regularization penalizes large amplitudes and extreme decay rates.

Expression 0.5 * a * sin((2 * PI / 12) * t) + b Symbols x or t refer to the axis index; use basic math functions (sin, cos, exp, log, sqrt, abs, pow, min, max). Initial parameters (comma separated, e.g. a=1, b=0) Fit epochs Learning rate Example: 0.5 * a * sin((2 * PI / 12) * t) + b