Function levenberg_marquardt 

pub fn levenberg_marquardt(
    model: &dyn FitModel,
    y_obs: &[f64],
    sigma: &[f64],
    params: &mut ParameterSet,
    config: &LmConfig,
) -> Result<LmResult, FittingError>

Run the Levenberg-Marquardt optimizer.

Arguments

• model — Forward model implementing FitModel.
• y_obs — Observed data values.
• sigma — Uncertainties on observed data (standard deviations).
• params — Initial parameter set (modified in place on convergence).
• config — LM configuration.

Returns

Fit result including final parameters, chi-squared, and uncertainties.