F1 Score
MediumMachine LearningArray
Description
Given equal-length binary arrays yTrue and yPred (1 = positive), return the F1 score (harmonic mean of precision and recall), rounded to 4 decimal places. If precision + recall is 0, return 0.
Examples
Input:
yTrue = [1,0,1,1], yPred = [1,1,1,0]Output:
0.6667Explanation:
Combining precision and recall through their harmonic mean gives 0.6667.
Input:
yTrue = [1,1,0,0], yPred = [1,0,0,0]Output:
0.6667Explanation:
Combining precision and recall through their harmonic mean gives 0.6667.
Input:
yTrue = [0,0], yPred = [0,0]Output:
0Explanation:
Combining precision and recall through their harmonic mean gives 0.
Constraints
- •
1 ≤ yTrue.length ≤ 10⁴ - •
values are 0 or 1