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45 lines
844 B
Markdown
45 lines
844 B
Markdown
# Confusion Matrix
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Class for compute confusion matrix to evaluate the accuracy of a classification.
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### Example (all targets)
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Compute ConfusionMatrix for all targets.
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```
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use Phpml\Metric\ConfusionMatrix;
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$actualTargets = [2, 0, 2, 2, 0, 1];
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$predictedTargets = [0, 0, 2, 2, 0, 2];
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$confusionMatrix = ConfusionMatrix::compute($actualTargets, $predictedTargets)
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/*
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$confusionMatrix = [
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[2, 0, 0],
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[0, 0, 1],
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[1, 0, 2],
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];
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*/
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```
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### Example (chosen targets)
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Compute ConfusionMatrix for chosen targets.
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```
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use Phpml\Metric\ConfusionMatrix;
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$actualTargets = ['cat', 'ant', 'cat', 'cat', 'ant', 'bird'];
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$predictedTargets = ['ant', 'ant', 'cat', 'cat', 'ant', 'cat'];
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$confusionMatrix = ConfusionMatrix::compute($actualTargets, $predictedTargets, ['ant', 'bird'])
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/*
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$confusionMatrix = [
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[2, 0],
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[0, 0],
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];
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*/
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```
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