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<a href="rectifier__function_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="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#ifndef MLPACK_METHODS_ANN_ACTIVATION_FUNCTIONS_RECTIFIER_FUNCTION_HPP</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#define MLPACK_METHODS_ANN_ACTIVATION_FUNCTIONS_RECTIFIER_FUNCTION_HPP</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="code" href="prereqs_8hpp.html">mlpack/prereqs.hpp</a>></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace </span><a class="code" href="namespacemlpack.html">mlpack</a> {</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">namespace </span>ann {</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1RectifierFunction.html"> 45</a></span> <span class="keyword">class </span><a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html">RectifierFunction</a></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> {</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1RectifierFunction.html#a655a369c005a8eebc415b960423e04a2"> 54</a></span>  <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#a655a369c005a8eebc415b960423e04a2">Fn</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> x)</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  {</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">return</span> std::max(0.0, x);</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">template</span><<span class="keyword">typename</span> eT></div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1RectifierFunction.html#a63665b9b29ec6d24a5ac251b9944e581"> 66</a></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#a63665b9b29ec6d24a5ac251b9944e581">Fn</a>(<span class="keyword">const</span> arma::Mat<eT>& x, arma::Mat<eT>& y)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  y = arma::max(arma::zeros<arma::Mat<eT> >(x.n_rows, x.n_cols), x);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">template</span><<span class="keyword">typename</span> eT></div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1RectifierFunction.html#acd2addd43cd8b4c33903f93ae67a6875"> 78</a></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#acd2addd43cd8b4c33903f93ae67a6875">Fn</a>(<span class="keyword">const</span> arma::Cube<eT>& x, arma::Cube<eT>& y)</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  y = x;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> s = 0; s < x.n_slices; s++)</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#a655a369c005a8eebc415b960423e04a2">Fn</a>(x.slice(s), y.slice(s));</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00091"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1RectifierFunction.html#a76c46575a38ebcf05fc9272359b31da0"> 91</a></span>  <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#a76c46575a38ebcf05fc9272359b31da0">Deriv</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> y)</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  {</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> y > 0;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">template</span><<span class="keyword">typename</span> InputType, <span class="keyword">typename</span> OutputType></div><div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1RectifierFunction.html#a60a0ea962465670e6dce16ad76c800ef"> 103</a></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#a60a0ea962465670e6dce16ad76c800ef">Deriv</a>(<span class="keyword">const</span> InputType& y, OutputType& x)</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  x = y;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < y.n_elem; i++)</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  x(i) = <a class="code" href="classmlpack_1_1ann_1_1RectifierFunction.html#a76c46575a38ebcf05fc9272359b31da0">Deriv</a>(y(i));</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> }; <span class="comment">// class RectifierFunction</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> } <span class="comment">// namespace ann</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> } <span class="comment">// namespace mlpack</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="classmlpack_1_1ann_1_1RectifierFunction_html_a60a0ea962465670e6dce16ad76c800ef"><div class="ttname"><a href="classmlpack_1_1ann_1_1RectifierFunction.html#a60a0ea962465670e6dce16ad76c800ef">mlpack::ann::RectifierFunction::Deriv</a></div><div class="ttdeci">static void Deriv(const InputType &y, OutputType &x)</div><div class="ttdoc">Computes the first derivatives of the rectifier function. </div><div class="ttdef"><b>Definition:</b> <a href="rectifier__function_8hpp_source.html#l00103">rectifier_function.hpp:103</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="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_1ann_1_1RectifierFunction_html_a63665b9b29ec6d24a5ac251b9944e581"><div class="ttname"><a href="classmlpack_1_1ann_1_1RectifierFunction.html#a63665b9b29ec6d24a5ac251b9944e581">mlpack::ann::RectifierFunction::Fn</a></div><div class="ttdeci">static void Fn(const arma::Mat< eT > &x, arma::Mat< eT > &y)</div><div class="ttdoc">Computes the rectifier function using a dense matrix as input. </div><div class="ttdef"><b>Definition:</b> <a href="rectifier__function_8hpp_source.html#l00066">rectifier_function.hpp:66</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1RectifierFunction_html_acd2addd43cd8b4c33903f93ae67a6875"><div class="ttname"><a href="classmlpack_1_1ann_1_1RectifierFunction.html#acd2addd43cd8b4c33903f93ae67a6875">mlpack::ann::RectifierFunction::Fn</a></div><div class="ttdeci">static void Fn(const arma::Cube< eT > &x, arma::Cube< eT > &y)</div><div class="ttdoc">Computes the rectifier function using a 3rd-order tensor as input. </div><div class="ttdef"><b>Definition:</b> <a href="rectifier__function_8hpp_source.html#l00078">rectifier_function.hpp:78</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1RectifierFunction_html_a76c46575a38ebcf05fc9272359b31da0"><div class="ttname"><a href="classmlpack_1_1ann_1_1RectifierFunction.html#a76c46575a38ebcf05fc9272359b31da0">mlpack::ann::RectifierFunction::Deriv</a></div><div class="ttdeci">static double Deriv(const double y)</div><div class="ttdoc">Computes the first derivative of the rectifier function. </div><div class="ttdef"><b>Definition:</b> <a href="rectifier__function_8hpp_source.html#l00091">rectifier_function.hpp:91</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1RectifierFunction_html_a655a369c005a8eebc415b960423e04a2"><div class="ttname"><a href="classmlpack_1_1ann_1_1RectifierFunction.html#a655a369c005a8eebc415b960423e04a2">mlpack::ann::RectifierFunction::Fn</a></div><div class="ttdeci">static double Fn(const double x)</div><div class="ttdoc">Computes the rectifier function. </div><div class="ttdef"><b>Definition:</b> <a href="rectifier__function_8hpp_source.html#l00054">rectifier_function.hpp:54</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1RectifierFunction_html"><div class="ttname"><a href="classmlpack_1_1ann_1_1RectifierFunction.html">mlpack::ann::RectifierFunction</a></div><div class="ttdoc">The rectifier function, defined by. </div><div class="ttdef"><b>Definition:</b> <a href="rectifier__function_8hpp_source.html#l00045">rectifier_function.hpp:45</a></div></div>
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