2021-12-04 13:55:42 +08:00
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mindspore.nn.Top1CategoricalAccuracy
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====================================
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.. py:class:: mindspore.nn.Top1CategoricalAccuracy
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2021-12-04 18:37:47 +08:00
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计算top-1分类正确率。此类是TopKCategoricalAccuracy的特殊类。有关更多详细信息，请参阅 :class:`TopKCategoricalAccuracy`。
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2021-12-04 13:55:42 +08:00
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**样例：**
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>>> x = Tensor(np.array([[0.2, 0.5, 0.3, 0.6, 0.2], [0.1, 0.35, 0.5, 0.2, 0.],
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... [0.9, 0.6, 0.2, 0.01, 0.3]]), mindspore.float32)
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>>> y = Tensor(np.array([2, 0, 1]), mindspore.float32)
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>>> topk = nn.Top1CategoricalAccuracy()
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>>> topk.clear()
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>>> topk.update(x, y)
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>>> output = topk.eval()
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>>> print(output)
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0.0
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