gam 0.3.121

Generalized penalized likelihood engine
Documentation 
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#[derive(Debug, thiserror::Error)]
pub enum LinalgError {
    #[error("Invalid input: {0}")]
    InvalidInput(String),

    #[error(
        "Hessian matrix is not positive definite (minimum eigenvalue: {min_eigenvalue:.4e}). This indicates a numerical instability."
    )]
    HessianNotPositiveDefinite { min_eigenvalue: f64 },

    #[error(
        "Model is ill-conditioned with condition number {condition_number:.2e}. This typically occurs when the model is over-parameterized (too many knots relative to data points). Consider reducing the number of knots or increasing regularization."
    )]
    ModelIsIllConditioned { condition_number: f64 },
}