Function rusty_machine::analysis::score::f1
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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