Function rusty_machine::analysis::score::precision

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

Returns the precision score for 2 class classification.

Precision is calculated with true-positive / (true-positive + false-positive), see Precision and Recall 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::precision;
let outputs = [1, 1, 1, 0, 0, 0];
let targets = [1, 1, 0, 0, 1, 1];

assert_eq!(precision(outputs.iter(), targets.iter()), 2.0f64 / 3.0f64);

Panics

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