Function analyze_missing_pattern 

pub fn analyze_missing_pattern(
    time: Vec<f64>,
    status: Vec<i32>,
    x: Vec<f64>,
    n_obs: usize,
    n_vars: usize,
    missing_indicators: Vec<bool>,
    n_imputations: usize,
) -> PyResult<(Vec<f64>, Vec<String>, bool)>