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                ## 混亂矩陣 > 計算混淆矩陣的類,用于評估分類的準確性。 > ***** ### 示例(所有目標) 為所有目標計算ConfusionMatrix。 ``` use Phpml\Metric\ConfusionMatrix; $actualTargets = [2, 0, 2, 2, 0, 1]; $predictedTargets = [0, 0, 2, 2, 0, 2]; $confusionMatrix = ConfusionMatrix::compute($actualTargets, $predictedTargets) /* $confusionMatrix = [ [2, 0, 0], [0, 0, 1], [1, 0, 2], ]; */ ``` ***** ### 示例(選擇的目標) 為所選目標計算ConfusionMatrix。 ``` use Phpml\Metric\ConfusionMatrix; $actualTargets = ['cat', 'ant', 'cat', 'cat', 'ant', 'bird']; $predictedTargets = ['ant', 'ant', 'cat', 'cat', 'ant', 'cat']; $confusionMatrix = ConfusionMatrix::compute($actualTargets, $predictedTargets, ['ant', 'bird']) /* $confusionMatrix = [ [2, 0], [0, 0], ]; */ ```
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