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<a href="gradient__descent_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#ifndef MLPACK_CORE_OPTIMIZERS_GRADIENT_DESCENT_GRADIENT_DESCENT_HPP</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#define MLPACK_CORE_OPTIMIZERS_GRADIENT_DESCENT_GRADIENT_DESCENT_HPP</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <<a class="code" href="prereqs_8hpp.html">mlpack/prereqs.hpp</a>></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span><a class="code" href="namespacemlpack.html">mlpack</a> {</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span>optimization {</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">template</span><<span class="keyword">typename</span> FunctionType></div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html"> 53</a></span> <span class="keyword">class </span><a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html">GradientDescent</a></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a4755e084ee5cde85897e241cd1117a85">GradientDescent</a>(FunctionType& <span class="keyword">function</span>,</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a715079a2cf3184cae181d47afe4cbd42">stepSize</a> = 0.01,</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a7bf45f14dbde579be1c4ecb934d2984f">maxIterations</a> = 100000,</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3e84efdf47853d628655a1750fb8523a">tolerance</a> = 1e-5);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a781e2e83082a14ce71a2bfc8a36f41e0">Optimize</a>(arma::mat& iterate);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#aaa6285f395314801d8822d7553719fb4"> 84</a></span>  <span class="keyword">const</span> FunctionType& <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#aaa6285f395314801d8822d7553719fb4">Function</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">function</span>; }</div><div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3850668f2220842895a6b1a3eb567259"> 86</a></span>  FunctionType& <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3850668f2220842895a6b1a3eb567259">Function</a>() { <span class="keywordflow">return</span> <span class="keyword">function</span>; }</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a6073395f5d8c020ea20d8d5d519a257d"> 89</a></span>  <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a6073395f5d8c020ea20d8d5d519a257d">StepSize</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a715079a2cf3184cae181d47afe4cbd42">stepSize</a>; }</div><div class="line"><a name="l00091"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3a55d15d3e55a40b1428b2248392dd00"> 91</a></span>  <span class="keywordtype">double</span>& <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3a55d15d3e55a40b1428b2248392dd00">StepSize</a>() { <span class="keywordflow">return</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a715079a2cf3184cae181d47afe4cbd42">stepSize</a>; }</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div><div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#ab8cf876f67ec1dea34b86eaf4ecfc725"> 94</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#ab8cf876f67ec1dea34b86eaf4ecfc725">MaxIterations</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a7bf45f14dbde579be1c4ecb934d2984f">maxIterations</a>; }</div><div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3dcebe67040ad2ca5d93ab3084686e6e"> 96</a></span>  <span class="keywordtype">size_t</span>& <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3dcebe67040ad2ca5d93ab3084686e6e">MaxIterations</a>() { <span class="keywordflow">return</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a7bf45f14dbde579be1c4ecb934d2984f">maxIterations</a>; }</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a04f7740c385eb35d65ffdce08b3f581a"> 99</a></span>  <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a04f7740c385eb35d65ffdce08b3f581a">Tolerance</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3e84efdf47853d628655a1750fb8523a">tolerance</a>; }</div><div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a16c47ee04e37a438ab9be28e971b04b4"> 101</a></span>  <span class="keywordtype">double</span>& <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a16c47ee04e37a438ab9be28e971b04b4">Tolerance</a>() { <span class="keywordflow">return</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3e84efdf47853d628655a1750fb8523a">tolerance</a>; }</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a86773ecb5168d7cb08e36cda3d336b55"> 105</a></span>  FunctionType& <span class="keyword">function</span>;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a715079a2cf3184cae181d47afe4cbd42"> 108</a></span>  <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a715079a2cf3184cae181d47afe4cbd42">stepSize</a>;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a7bf45f14dbde579be1c4ecb934d2984f"> 111</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a7bf45f14dbde579be1c4ecb934d2984f">maxIterations</a>;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3e84efdf47853d628655a1750fb8523a"> 114</a></span>  <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1optimization_1_1GradientDescent.html#a3e84efdf47853d628655a1750fb8523a">tolerance</a>;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> };</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> } <span class="comment">// namespace optimization</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> } <span class="comment">// namespace mlpack</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">// Include implementation.</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#include "gradient_descent_impl.hpp"</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a715079a2cf3184cae181d47afe4cbd42"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a715079a2cf3184cae181d47afe4cbd42">mlpack::optimization::GradientDescent::stepSize</a></div><div class="ttdeci">double stepSize</div><div class="ttdoc">The step size for each example. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00108">gradient_descent.hpp:108</a></div></div>
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<div class="ttc" id="namespacemlpack_html"><div class="ttname"><a href="namespacemlpack.html">mlpack</a></div><div class="ttdoc">Linear algebra utility functions, generally performed on matrices or vectors. </div><div class="ttdef"><b>Definition:</b> <a href="binarize_8hpp_source.html#l00018">binarize.hpp:18</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a04f7740c385eb35d65ffdce08b3f581a"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a04f7740c385eb35d65ffdce08b3f581a">mlpack::optimization::GradientDescent::Tolerance</a></div><div class="ttdeci">double Tolerance() const </div><div class="ttdoc">Get the tolerance for termination. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00099">gradient_descent.hpp:99</a></div></div>
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<div class="ttc" id="prereqs_8hpp_html"><div class="ttname"><a href="prereqs_8hpp.html">prereqs.hpp</a></div><div class="ttdoc">The core includes that mlpack expects; standard C++ includes and Armadillo. </div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a781e2e83082a14ce71a2bfc8a36f41e0"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a781e2e83082a14ce71a2bfc8a36f41e0">mlpack::optimization::GradientDescent::Optimize</a></div><div class="ttdeci">double Optimize(arma::mat &iterate)</div><div class="ttdoc">Optimize the given function using gradient descent. </div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html">mlpack::optimization::GradientDescent</a></div><div class="ttdoc">Gradient Descent is a technique to minimize a function. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00053">gradient_descent.hpp:53</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_ab8cf876f67ec1dea34b86eaf4ecfc725"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#ab8cf876f67ec1dea34b86eaf4ecfc725">mlpack::optimization::GradientDescent::MaxIterations</a></div><div class="ttdeci">size_t MaxIterations() const </div><div class="ttdoc">Get the maximum number of iterations (0 indicates no limit). </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00094">gradient_descent.hpp:94</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a3e84efdf47853d628655a1750fb8523a"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a3e84efdf47853d628655a1750fb8523a">mlpack::optimization::GradientDescent::tolerance</a></div><div class="ttdeci">double tolerance</div><div class="ttdoc">The tolerance for termination. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00114">gradient_descent.hpp:114</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a7bf45f14dbde579be1c4ecb934d2984f"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a7bf45f14dbde579be1c4ecb934d2984f">mlpack::optimization::GradientDescent::maxIterations</a></div><div class="ttdeci">size_t maxIterations</div><div class="ttdoc">The maximum number of allowed iterations. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00111">gradient_descent.hpp:111</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a6073395f5d8c020ea20d8d5d519a257d"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a6073395f5d8c020ea20d8d5d519a257d">mlpack::optimization::GradientDescent::StepSize</a></div><div class="ttdeci">double StepSize() const </div><div class="ttdoc">Get the step size. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00089">gradient_descent.hpp:89</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a16c47ee04e37a438ab9be28e971b04b4"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a16c47ee04e37a438ab9be28e971b04b4">mlpack::optimization::GradientDescent::Tolerance</a></div><div class="ttdeci">double & Tolerance()</div><div class="ttdoc">Modify the tolerance for termination. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00101">gradient_descent.hpp:101</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_aaa6285f395314801d8822d7553719fb4"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#aaa6285f395314801d8822d7553719fb4">mlpack::optimization::GradientDescent::Function</a></div><div class="ttdeci">const FunctionType & Function() const </div><div class="ttdoc">Get the instantiated function to be optimized. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00084">gradient_descent.hpp:84</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a3a55d15d3e55a40b1428b2248392dd00"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a3a55d15d3e55a40b1428b2248392dd00">mlpack::optimization::GradientDescent::StepSize</a></div><div class="ttdeci">double & StepSize()</div><div class="ttdoc">Modify the step size. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00091">gradient_descent.hpp:91</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a4755e084ee5cde85897e241cd1117a85"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a4755e084ee5cde85897e241cd1117a85">mlpack::optimization::GradientDescent::GradientDescent</a></div><div class="ttdeci">GradientDescent(FunctionType &function, const double stepSize=0.01, const size_t maxIterations=100000, const double tolerance=1e-5)</div><div class="ttdoc">Construct the Gradient Descent optimizer with the given function and parameters. </div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a3850668f2220842895a6b1a3eb567259"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a3850668f2220842895a6b1a3eb567259">mlpack::optimization::GradientDescent::Function</a></div><div class="ttdeci">FunctionType & Function()</div><div class="ttdoc">Modify the instantiated function. </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00086">gradient_descent.hpp:86</a></div></div>
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<div class="ttc" id="classmlpack_1_1optimization_1_1GradientDescent_html_a3dcebe67040ad2ca5d93ab3084686e6e"><div class="ttname"><a href="classmlpack_1_1optimization_1_1GradientDescent.html#a3dcebe67040ad2ca5d93ab3084686e6e">mlpack::optimization::GradientDescent::MaxIterations</a></div><div class="ttdeci">size_t & MaxIterations()</div><div class="ttdoc">Modify the maximum number of iterations (0 indicates no limit). </div><div class="ttdef"><b>Definition:</b> <a href="gradient__descent_8hpp_source.html#l00096">gradient_descent.hpp:96</a></div></div>
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