mindspore.nn.Top1CategoricalAccuracy
- class mindspore.nn.Top1CategoricalAccuracy[源代码]
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
TopKCategoricalAccuracy
。- 支持平台:
Ascend
GPU
CPU
样例:
>>> import numpy as np >>> from mindspore import nn, Tensor >>> >>> x = Tensor(np.array([[0.2, 0.5, 0.3, 0.6, 0.2], [0.1, 0.35, 0.5, 0.2, 0.], ... [0.9, 0.6, 0.2, 0.01, 0.3]]), mindspore.float32) >>> y = Tensor(np.array([2, 0, 1]), mindspore.float32) >>> topk = nn.Top1CategoricalAccuracy() >>> topk.clear() >>> topk.update(x, y) >>> output = topk.eval() >>> print(output) 0.0