Confusion Matrix（混淆矩阵）

True Positive:

Interpretation: You predicted positive and it’s true.

True Negative:

Interpretation: You predicted negative and it’s true.

False Positive: (Type 1 Error)

Interpretation: You predicted positive and it’s false.

False Negative: (Type 2 Error)

Interpretation: You predicted negative and it’s false.

Just Remember, We describe predicted values as Positive and Negative and actual values as True and False.

Recall:Out of all the positive classes, how much we predicted correctly. It should be high as possible.

Precision:Out of all the classes, how much we predicted correctly. It should be high as possible.

F-measure:越大越好

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