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src
shogun
optimization
GradientDescendUpdater.cpp
浏览该文件的文档.
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/*
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* Copyright (c) The Shogun Machine Learning Toolbox
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* Written (w) 2015 Wu Lin
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are those
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* of the authors and should not be interpreted as representing official policies,
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* either expressed or implied, of the Shogun Development Team.
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*
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*/
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#include <
shogun/optimization/GradientDescendUpdater.h
>
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#include <
shogun/lib/config.h
>
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using namespace
shogun
;
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GradientDescendUpdater::GradientDescendUpdater
()
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:
DescendUpdaterWithCorrection
()
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{
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init();
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}
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GradientDescendUpdater::~GradientDescendUpdater
()
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{
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}
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void
GradientDescendUpdater::init()
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{
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}
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float64_t
GradientDescendUpdater::get_negative_descend_direction
(
float64_t
variable,
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float64_t
gradient,
index_t
idx,
float64_t
learning_rate)
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{
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return
learning_rate*gradient;
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}
index_t
int32_t index_t
Definition:
common.h:62
shogun::GradientDescendUpdater::~GradientDescendUpdater
virtual ~GradientDescendUpdater()
Definition:
GradientDescendUpdater.cpp:42
GradientDescendUpdater.h
config.h
float64_t
double float64_t
Definition:
common.h:50
shogun
all of classes and functions are contained in the shogun namespace
Definition:
class_list.h:18
shogun::DescendUpdaterWithCorrection
This is a base class for descend update with descend based correction.
Definition:
DescendUpdaterWithCorrection.h:52
shogun::GradientDescendUpdater::get_negative_descend_direction
virtual float64_t get_negative_descend_direction(float64_t variable, float64_t gradient, index_t idx, float64_t learning_rate)
Definition:
GradientDescendUpdater.cpp:50
shogun::GradientDescendUpdater::GradientDescendUpdater
GradientDescendUpdater()
Definition:
GradientDescendUpdater.cpp:36
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