mindspore2022/docs/api/api_python/nn/mindspore.nn.Sigmoid.rst

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mindspore.nn.Sigmoid
=============================
.. py:class:: mindspore.nn.Sigmoid
Sigmoid激活函数。
按元素计算Sigmoid激活函数。
Sigmoid函数定义为
.. math::
\text{sigmoid}(x_i) = \frac{1}{1 + \exp(-x_i)},
其中 :math:`x_i` 是输入的元素。
关于Sigmoid的图例见 `Sigmoid <https://en.wikipedia.org/wiki/Sigmoid_function#/media/File:Logistic-curve.svg>`_
**输入:**
- **x** (Tensor) - 数据类型为float16或float32的Sgmoid输入。任意维度的Tensor。
**输出:**
Tensor数据类型和shape与 `x` 的相同。
**异常:**
**TypeError** - `x` 的数据类型既不是float16也不是float32。