#################
 fluid.regularizer
#################



.. _cn_api_fluid_regularizer_L1DecayRegularizer:

L1DecayRegularizer
>>>>>>>>>>>>

.. py:class:: paddle.fluid.regularizer.L1DecayRegularizer(regularization_coeff=0.0)

实现 L1 权重衰减正则化。

L1正则将会稀疏化权重矩阵。


.. math::
            \\L1WeightDecay=reg\_coeff∗sign(parameter)\\

参数:
  - **regularization_coeff** (float) – 正则化系数
  
**代码示例**

..  code-block:: python
    
    ioptimizer = fluid.optimizer.Adagrad(
                            learning_rate=1e-4,
                            regularization=fluid.regularizer.L1DecayRegularizer(
                             regularization_coeff=0.1))
    optimizer.minimize(avg_cost)
    
  
  


英文版API文档: :ref:`api_fluid_regularizer_L1DecayRegularizer` 

.. _cn_api_fluid_regularizer_L2DecayRegularizer:

L2DecayRegularizer
>>>>>>>>>>>>

.. py:class:: paddle.fluid.regularizer.L2DecayRegularizer(regularization_coeff=0.0)

实现L2 权重衰减正则化。 

较小的 L2 的有助于防止对训练数据的过度拟合。

.. math::
            \\L2WeightDecay=reg\_coeff*parameter\\

参数:
  - **regularization_coeff** (float) – 正则化系数
  
**代码示例**

..  code-block:: python
    
   optimizer = fluid.optimizer.Adagrad(
                            learning_rate=1e-4,
                            regularization=fluid.regularizer.L2DecayRegularizer(
                            regularization_coeff=0.1))
    optimizer.minimize(avg_cost)



英文版API文档: :ref:`api_fluid_regularizer_L2DecayRegularizer`