Expand description
Primitive loss and error helpers for optimization.
§Examples
use use_loss::{absolute_error, mean_squared_error, root_mean_squared_error};
assert_eq!(absolute_error(4.0, 3.0), 1.0);
assert_eq!(mean_squared_error(&[1.0, 2.0], &[1.0, 4.0]).unwrap(), 2.0);
assert_eq!(root_mean_squared_error(&[1.0, 2.0], &[1.0, 4.0]).unwrap(), 2.0_f64.sqrt());