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<a href="identity__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="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#ifndef MLPACK_METHODS_ANN_ACTIVATION_FUNCTIONS_IDENTITY_FUNCTION_HPP</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#define MLPACK_METHODS_ANN_ACTIVATION_FUNCTIONS_IDENTITY_FUNCTION_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"><a class="line" href="namespacemlpack_1_1ann.html"> 18</a></span> <span class="keyword">namespace </span>ann {</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1IdentityFunction.html"> 28</a></span> <span class="keyword">class </span><a class="code" href="classmlpack_1_1ann_1_1IdentityFunction.html">IdentityFunction</a></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> {</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1IdentityFunction.html#a590c98bbba9f73ef40c966613d7330a8"> 37</a></span>  <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1ann_1_1IdentityFunction.html#a590c98bbba9f73ef40c966613d7330a8">Fn</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> x)</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">return</span> x;</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">template</span><<span class="keyword">typename</span> InputVecType, <span class="keyword">typename</span> OutputVecType></div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1IdentityFunction.html#a97d04d2651aa1715914eedd2f130bba4"> 49</a></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1ann_1_1IdentityFunction.html#a97d04d2651aa1715914eedd2f130bba4">Fn</a>(<span class="keyword">const</span> InputVecType& x, OutputVecType& y)</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  y = x;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1IdentityFunction.html#a37dada667419a25f1283d76e54090ab6"> 60</a></span>  <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="classmlpack_1_1ann_1_1IdentityFunction.html#a37dada667419a25f1283d76e54090ab6">Deriv</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> <span class="comment">/* unused */</span>)</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  {</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> 1.0;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  }</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">template</span><<span class="keyword">typename</span> InputVecType, <span class="keyword">typename</span> OutputVecType></div><div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1IdentityFunction.html#a4f962c999b964c65a7c6c58a2843bc17"> 72</a></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1ann_1_1IdentityFunction.html#a4f962c999b964c65a7c6c58a2843bc17">Deriv</a>(<span class="keyword">const</span> InputVecType& y, OutputVecType& x)</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  {</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  x.ones(y.n_elem);</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">template</span><<span class="keyword">typename</span> eT></div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="classmlpack_1_1ann_1_1IdentityFunction.html#aa4cfd89616779092625ade49c1eade6c"> 85</a></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1ann_1_1IdentityFunction.html#aa4cfd89616779092625ade49c1eade6c">Deriv</a>(<span class="keyword">const</span> arma::Cube<eT>& y, arma::Cube<eT>& x)</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  x.ones(y.n_rows, y.n_cols, y.n_slices);</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> }; <span class="comment">// class IdentityFunction</span></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="comment">// namespace ann</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> } <span class="comment">// namespace mlpack</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="classmlpack_1_1ann_1_1IdentityFunction_html"><div class="ttname"><a href="classmlpack_1_1ann_1_1IdentityFunction.html">mlpack::ann::IdentityFunction</a></div><div class="ttdoc">The identity function, defined by. </div><div class="ttdef"><b>Definition:</b> <a href="identity__function_8hpp_source.html#l00028">identity_function.hpp:28</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_1IdentityFunction_html_a4f962c999b964c65a7c6c58a2843bc17"><div class="ttname"><a href="classmlpack_1_1ann_1_1IdentityFunction.html#a4f962c999b964c65a7c6c58a2843bc17">mlpack::ann::IdentityFunction::Deriv</a></div><div class="ttdeci">static void Deriv(const InputVecType &y, OutputVecType &x)</div><div class="ttdoc">Computes the first derivatives of the identity function. </div><div class="ttdef"><b>Definition:</b> <a href="identity__function_8hpp_source.html#l00072">identity_function.hpp:72</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1IdentityFunction_html_a97d04d2651aa1715914eedd2f130bba4"><div class="ttname"><a href="classmlpack_1_1ann_1_1IdentityFunction.html#a97d04d2651aa1715914eedd2f130bba4">mlpack::ann::IdentityFunction::Fn</a></div><div class="ttdeci">static void Fn(const InputVecType &x, OutputVecType &y)</div><div class="ttdoc">Computes the identity function. </div><div class="ttdef"><b>Definition:</b> <a href="identity__function_8hpp_source.html#l00049">identity_function.hpp:49</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1IdentityFunction_html_a37dada667419a25f1283d76e54090ab6"><div class="ttname"><a href="classmlpack_1_1ann_1_1IdentityFunction.html#a37dada667419a25f1283d76e54090ab6">mlpack::ann::IdentityFunction::Deriv</a></div><div class="ttdeci">static double Deriv(const double)</div><div class="ttdoc">Computes the first derivative of the identity function. </div><div class="ttdef"><b>Definition:</b> <a href="identity__function_8hpp_source.html#l00060">identity_function.hpp:60</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1IdentityFunction_html_aa4cfd89616779092625ade49c1eade6c"><div class="ttname"><a href="classmlpack_1_1ann_1_1IdentityFunction.html#aa4cfd89616779092625ade49c1eade6c">mlpack::ann::IdentityFunction::Deriv</a></div><div class="ttdeci">static void Deriv(const arma::Cube< eT > &y, arma::Cube< eT > &x)</div><div class="ttdoc">Computes the first derivatives of the identity function using a 3rd order tensor as input...</div><div class="ttdef"><b>Definition:</b> <a href="identity__function_8hpp_source.html#l00085">identity_function.hpp:85</a></div></div>
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<div class="ttc" id="classmlpack_1_1ann_1_1IdentityFunction_html_a590c98bbba9f73ef40c966613d7330a8"><div class="ttname"><a href="classmlpack_1_1ann_1_1IdentityFunction.html#a590c98bbba9f73ef40c966613d7330a8">mlpack::ann::IdentityFunction::Fn</a></div><div class="ttdeci">static double Fn(const double x)</div><div class="ttdoc">Computes the identity function. </div><div class="ttdef"><b>Definition:</b> <a href="identity__function_8hpp_source.html#l00037">identity_function.hpp:37</a></div></div>
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