Function aic_python 

pub fn aic_python(log_likelihood: f64, n_coef: usize) -> f64

Computes AIC using Python/statsmodels convention.

AIC = 2k - 2logL

where k is the number of coefficients (NOT including variance parameter). This matches Python’s statsmodels OLS.aic behavior.

Arguments

• log_likelihood - Log-likelihood of the model
• n_coef - Number of coefficients (including intercept)

Example

let aic_value = aic_python(-150.5, 3);  // 3 coefficients