INNER CODE UNIT · Rust

std_deviation

bluenote-1577/skani · src/chain.rs:39

fn std_deviation(data: &[f64]) -> f64 {
    let count = data.len();
    let data_mean = mean(&data);
    if data_mean.is_none(){
        return 0.
    }
    else{
        let data_mean = data_mean.unwrap();
        let variance = data.iter().map(|value| {
            let diff = data_mean - (*value);

            diff * diff
        }).sum::<f64>() / count as f64;

        variance.sqrt()
    }
}

View source record →