Function f1 

pub fn f1<'a, I, T>(outputs: I, targets: I) -> f64
where
    I: ExactSizeIterator<Item = &'a T>,
    T: 'a + PartialEq + Zero + One,

Returns the f1 score for 2 class classification.

F1-score is calculated with 2 * precision * recall / (precision + recall), see F1 score for details.

Arguments

• outputs - Iterator of output (predicted) labels which only contains 0 or 1.
• targets - Iterator of expected (actual) labels which only contains 0 or 1.

Examples

use rusty_machine::analysis::score::f1;
let outputs = [1, 1, 1, 0, 0, 0];
let targets = [1, 1, 0, 0, 1, 1];

assert_eq!(f1(outputs.iter(), targets.iter()), 0.5714285714285714);

Panics

• outputs and targets have different length
• outputs or targets contains a value which is not 0 or 1