2021-12-04 13:55:42 +08:00
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mindspore.ops.Log
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=================
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2021-12-22 11:46:09 +08:00
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.. py:class:: mindspore.ops.Log()
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2021-12-04 13:55:42 +08:00
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2021-12-22 11:46:09 +08:00
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逐元素返回Tensor的自然对数。
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2021-12-04 13:55:42 +08:00
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.. math::
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y_i = log_e(x_i)
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.. warning::
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2021-12-22 11:46:09 +08:00
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如果算子Log的输入值在(0，0.01]或[0.95，1.05]范围内，则输出精度可能会存在误差。
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.. note::
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Ascend上输入Tensor的维度要小于等于8，CPU上输入Tensor的维度要小于8。
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2021-12-04 13:55:42 +08:00
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**输入：**
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2021-12-22 11:46:09 +08:00
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- **x** (Tensor) - 任意维度的输入Tensor。该值必须大于0。
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2021-12-04 13:55:42 +08:00
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**输出：**
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Tensor，具有与 `x` 相同的shape。
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**异常：**
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- **TypeError** - `x` 不是Tensor。
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>>> x = Tensor(np.array([1.0, 2.0, 4.0]), mindspore.float32)
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>>> log = ops.Log()
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>>> output = log(x)
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>>> print(output)
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[0. 0.6931472 1.3862944]
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