混淆矩陣
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
混淆矩陣(粵拼:wan6 aau4 geoi2 zan6;英文:confusion matrix)係機械學習相關領域上成日用嘅一種矩陣,可以用嚟將一個模型做嘅分類「視覺化」噉表現出嚟。
如果一個模型係做二元分類嘅,模型質素亦可以用靈敏度同特異度作為指標嚟量度。靈敏度同特異度包括咗四個數值:
呢四個數值可以用 2 × 2 嘅混淆矩陣表達,好似以下噉[1][2]:
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