logsigmoid_cn.rst 621 字节
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.. _cn_api_fluid_layers_logsigmoid:

logsigmoid
-------------------------------

.. py:function:: paddle.fluid.layers.logsigmoid(x, name=None)

Logsigmoid激活函数。


.. math::

    out = \log \frac{1}{1 + e^{-x}}


参数:
    - **x** - LogSigmoid算子的输入
    - **use_cudnn** (BOOLEAN) – (bool,默认为false)是否仅用于cudnn核,需要安装cudnn

返回:        LogSigmoid算子的输出

**代码示例**:

.. code-block:: python

        import paddle.fluid as fluid
        data = fluid.layers.data(name="input", shape=[32, 784])
        result = fluid.layers.logsigmoid(data)