Precision

Precision

$\text{Precision}=\frac{|\text{relevant}\cap \text{retrieved}|}{|\text{retrieved}|}$

Fraction of retrieved documents that are relevant.

High precision = few false positives. See also Precision at K, Recall, F-Measure.

Appears In

• IR-L04 - Evaluation
• RS-L02 - Evaluation Beyond Accuracy