Dice Coefficient for Binary Labels

Problem

Compute the Dice coefficient for binary labels with positive class 1: 2*TP / (2*TP + FP + FN).

Return 0.0 when the denominator is zero or the input is empty.

Hint

The Dice coefficient is the F1 score of the positive class.

case 1

in: [[1,0,1,1],[1,0,0,1]]

expected: 0.8

case 2

in: [[1,1,0,0],[1,1,0,0]]

expected: 1

case 3

in: [[1,1],[0,0]]

expected: 0

case 4

in: [[],[]]

expected: 0

Starter codePython

def dice_coefficient(y_true, y_pred):
    # Your code here
    pass

4 test cases · run your code against them in the editor