Specificity from Counts

Problem

Specificity is TN / (TN + FP), the fraction of true negatives correctly identified. Return 0.0 when the denominator is zero.

Given the counts, return specificity.

Hint

It is recall applied to the negative class.

case 1

in: [9,1]

expected: 0.9

case 2

in: [4,0]

expected: 1

case 3

in: [0,3]

expected: 0

Starter codePython

def specificity_from_counts(tn, fp):
    # Your code here
    pass

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