forked from mindspore-Ecosystem/mindspore
50 lines
1.4 KiB
ReStructuredText
50 lines
1.4 KiB
ReStructuredText
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mindspore.ops.Elu
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=================
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.. py:class:: mindspore.ops.Elu(*args, **kwargs)
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指数线性单元激活函数(Exponential Linear Uint activation function)。
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对输入的每个元素计算Elu。该激活函数定义如下:
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.. math::
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\text{ELU}(x)= \left\{
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\begin{array}{align}
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\alpha(e^{x} - 1) & \text{if } x \le 0\\
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x & \text{if } x \gt 0\\
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\end{array}\right.
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ELU相关图参见 `ELU <https://en.wikipedia.org/wiki/Activation_function#/media/File:Activation_elu.svg>`_ 。
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**参数:**
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**alpha** (float):Elu的alpha值,数据类型为浮点数。默认值:1.0。
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**输入:**
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**x** (Tensor) - 用于计算Elu的Tensor,数据类型为float16或float32。shape为 :math:`(N,*)` ,:math:`*` 表示任意的附加维度数。
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**输出:**
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Tensor,shape和数据类型与 `x` 相同。
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**异常:**
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- **TypeError** - `alpha` 不是float。
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- **TypeError** - `x` 的数据类型既不是float16也不是float32。
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- **ValueError** - `alpha` 不等于1.0。
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**支持平台:**
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``Ascend`` ``GPU`` ``CPU``
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**样例:**
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>>> x = Tensor(np.array([[-1.0, 4.0, -8.0], [2.0, -5.0, 9.0]]), mindspore.float32)
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>>> elu = ops.Elu()
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>>> output = elu(x)
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>>> print(output)
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[[-0.63212055 4. -0.99966455]
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[ 2. -0.99326205 9. ]]
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