Precision, Recall and TNR
Ruvva Poojitha
Intern at Kroll Ex-GDSC Data Science lead Student at ADITYA INSTITUTE OF TECHNOLOGY & MANAGEMENT, K.Kothuru, Tekkali - 532201, Srikakulam District, A.P(CC-A5)
This is just to show simple way to remember!!!!
Recall : This is also called as Sensitivity or True Positive Rate (TPR) .
Based on the above image shows the arrow passing through TP and FN, and since it is True positive rate, then the numerator is TP and the denominator is the values through which recall arrow is passing (i.e., TP and FN)
Precision :
Based on the above image shows the arrow passing through TP and FP, and since it is calculated for ture predictions , then the numerator is TP and the denominator is the values through which precision arrow is passing (i.e., TP and FP)
True Negative Rate (TNR) : It is also called as Specificity.
Based on the above image shows the arrow passing through TN and FP, and since it is True Negative Rate, then the numerator is TN and the denominator is the values through which TNR arrow is passing (i.e., TN and FP)
Hope this could be helpful ??