Function std_dev
Source pub fn std_dev(data: &[f64]) -> Option<f64>
Expand description
Computes the sample standard deviation.
Equivalent to sqrt(variance(data)).
§Returns
None if data.len() < 2 or contains NaN/Inf.
§Examples
use u_numflow::stats::std_dev;
let v = [2.0, 4.0, 4.0, 4.0, 5.0, 5.0, 7.0, 9.0];
let sd = std_dev(&v).unwrap();
assert!((sd - 2.138089935299395).abs() < 1e-10);