Confusion Matrix, Accuracy, Recall, Precision.
consider an example of a binary classification problem: predicting whether an email is spam or not. ``` . Predicted . |. Spam. |. Not Spam. | – – – – – – – – – – – – – – – – – - Actual. Spam |. 93. |. 7. | . – – – – – – – – – – – – – – – – . Not Spam|. 15. |. 85. | ``` Accuracy: (93 + 85) / (93 + 7