Function nan_mean_std

crates/openquant/src/feature_importance.rs:364–367

(v: &[f64])

}

fn nan_mean_std(v: &[f64]) -> (f64, f64) {
    let vals: Vec<f64> = v.iter().copied().filter(|x| x.is_finite()).collect();
    mean_std(&vals)
}

fn mean_std(v: &[f64]) -> (f64, f64) {
    if v.is_empty() {