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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_44a936ef30fc126706c6284a2fc0c990.html">mlpack</a></li><li class="navelem"><a class="el" href="dir_f7ac9cdfd28b2e882eb44d163e3b98b4.html">core</a></li><li class="navelem"><a class="el" href="dir_d361cbf9654077cd65f7968e3f8eccf6.html">tree</a></li><li class="navelem"><a class="el" href="dir_f2c902aa2e0a74bdfe4e54224fb2267f.html">binary_space_tree</a></li> </ul>
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<div class="title">rp_tree_max_split.hpp</div> </div>
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<a href="rp__tree__max__split_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="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef MLPACK_CORE_TREE_BINARY_SPACE_TREE_RP_TREE_MAX_SPLIT_HPP</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define MLPACK_CORE_TREE_BINARY_SPACE_TREE_RP_TREE_MAX_SPLIT_HPP</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <<a class="code" href="prereqs_8hpp.html">mlpack/prereqs.hpp</a>></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <<a class="code" href="perform__split_8hpp.html">mlpack/core/tree/perform_split.hpp</a>></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span><a class="code" href="namespacemlpack.html">mlpack</a> {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>tree {</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">template</span><<span class="keyword">typename</span> BoundType, <span class="keyword">typename</span> MatType = arma::mat></div><div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html"> 32</a></span> <span class="keyword">class </span><a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html">RPTreeMaxSplit</a></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> {</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#a85936c73cab84e8bee94aeb920b202a1"> 36</a></span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> MatType::elem_type <a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#a85936c73cab84e8bee94aeb920b202a1">ElemType</a>;</div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html"> 38</a></span>  <span class="keyword">struct </span><a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html">SplitInfo</a></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  {</div><div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#a64f2b66cf4022f77d60fd8a727cab309"> 41</a></span>  arma::Col<ElemType> <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#a64f2b66cf4022f77d60fd8a727cab309">direction</a>;</div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#aca60cf8641352ba284f72a17201e5f11"> 43</a></span>  ElemType <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#aca60cf8641352ba284f72a17201e5f11">splitVal</a>;</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  };</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#aac12f205e8df6ca1de1c44ab7021b6f5">SplitNode</a>(<span class="keyword">const</span> BoundType& <span class="comment">/*bound*/</span>,</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  MatType& data,</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> begin,</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> count,</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html">SplitInfo</a>& splitInfo);</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#a42c68c131a828e4041c554060602968f"> 76</a></span>  <span class="keyword">static</span> <span class="keywordtype">size_t</span> <a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#a42c68c131a828e4041c554060602968f">PerformSplit</a>(MatType& data,</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> begin,</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> count,</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">const</span> <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html">SplitInfo</a>& splitInfo)</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  {</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> split::PerformSplit<MatType, RPTreeMaxSplit>(data, begin, count,</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  splitInfo);</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="l00101"></a><span class="lineno"><a class="line" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ac5ca2333a9159c30b5e5481194a9a204"> 101</a></span>  <span class="keyword">static</span> <span class="keywordtype">size_t</span> <a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ac5ca2333a9159c30b5e5481194a9a204">PerformSplit</a>(MatType& data,</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> begin,</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> count,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">const</span> <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html">SplitInfo</a>& splitInfo,</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  std::vector<size_t>& oldFromNew)</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">return</span> split::PerformSplit<MatType, RPTreeMaxSplit>(data, begin, count,</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  splitInfo, oldFromNew);</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> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">template</span><<span class="keyword">typename</span> VecType></div><div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ad0ca4ecedcb2921b9de0e376ff0662b9"> 118</a></span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ad0ca4ecedcb2921b9de0e376ff0662b9">AssignToLeftNode</a>(<span class="keyword">const</span> VecType& point, <span class="keyword">const</span> <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html">SplitInfo</a>& splitInfo)</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="keywordflow">return</span> (arma::dot(point, splitInfo.<a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#a64f2b66cf4022f77d60fd8a727cab309">direction</a>) <= splitInfo.<a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#aca60cf8641352ba284f72a17201e5f11">splitVal</a>);</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</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="keyword">private</span>:</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ae85b2eb2c1de3c4364e7f92a535d4aa4">GetSplitVal</a>(<span class="keyword">const</span> MatType& data,</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> begin,</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> count,</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">const</span> arma::Col<ElemType>& <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#a64f2b66cf4022f77d60fd8a727cab309">direction</a>,</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  ElemType& <a class="code" href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#aca60cf8641352ba284f72a17201e5f11">splitVal</a>);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> };</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> } <span class="comment">// namespace tree</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> } <span class="comment">// namespace mlpack</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment">// Include implementation.</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor">#include "rp_tree_max_split_impl.hpp"</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor">#endif // MLPACK_CORE_TREE_BINARY_SPACE_TREE_RP_TREE_MAX_SPLIT_HPP</span></div><div class="ttc" id="classmlpack_1_1tree_1_1RPTreeMaxSplit_html_a42c68c131a828e4041c554060602968f"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#a42c68c131a828e4041c554060602968f">mlpack::tree::RPTreeMaxSplit::PerformSplit</a></div><div class="ttdeci">static size_t PerformSplit(MatType &data, const size_t begin, const size_t count, const SplitInfo &splitInfo)</div><div class="ttdoc">Perform the split process according to the information about the split. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00076">rp_tree_max_split.hpp:76</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="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo_html_a64f2b66cf4022f77d60fd8a727cab309"><div class="ttname"><a href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#a64f2b66cf4022f77d60fd8a727cab309">mlpack::tree::RPTreeMaxSplit::SplitInfo::direction</a></div><div class="ttdeci">arma::Col< ElemType > direction</div><div class="ttdoc">The normal vector to the hyperplane that splits the node. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00041">rp_tree_max_split.hpp:41</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_1tree_1_1RPTreeMaxSplit_html"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html">mlpack::tree::RPTreeMaxSplit</a></div><div class="ttdoc">This class splits a node by a random hyperplane. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00032">rp_tree_max_split.hpp:32</a></div></div>
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<div class="ttc" id="classmlpack_1_1tree_1_1RPTreeMaxSplit_html_aac12f205e8df6ca1de1c44ab7021b6f5"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#aac12f205e8df6ca1de1c44ab7021b6f5">mlpack::tree::RPTreeMaxSplit::SplitNode</a></div><div class="ttdeci">static bool SplitNode(const BoundType &, MatType &data, const size_t begin, const size_t count, SplitInfo &splitInfo)</div><div class="ttdoc">Split the node by a random hyperplane. </div></div>
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<div class="ttc" id="classmlpack_1_1tree_1_1RPTreeMaxSplit_html_ad0ca4ecedcb2921b9de0e376ff0662b9"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ad0ca4ecedcb2921b9de0e376ff0662b9">mlpack::tree::RPTreeMaxSplit::AssignToLeftNode</a></div><div class="ttdeci">static bool AssignToLeftNode(const VecType &point, const SplitInfo &splitInfo)</div><div class="ttdoc">Indicates that a point should be assigned to the left subtree. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00118">rp_tree_max_split.hpp:118</a></div></div>
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<div class="ttc" id="perform__split_8hpp_html"><div class="ttname"><a href="perform__split_8hpp.html">perform_split.hpp</a></div></div>
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<div class="ttc" id="classmlpack_1_1tree_1_1RPTreeMaxSplit_html_ae85b2eb2c1de3c4364e7f92a535d4aa4"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ae85b2eb2c1de3c4364e7f92a535d4aa4">mlpack::tree::RPTreeMaxSplit::GetSplitVal</a></div><div class="ttdeci">static bool GetSplitVal(const MatType &data, const size_t begin, const size_t count, const arma::Col< ElemType > &direction, ElemType &splitVal)</div><div class="ttdoc">This method finds the position of the hyperplane that will split the node. </div></div>
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<div class="ttc" id="classmlpack_1_1tree_1_1RPTreeMaxSplit_html_ac5ca2333a9159c30b5e5481194a9a204"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#ac5ca2333a9159c30b5e5481194a9a204">mlpack::tree::RPTreeMaxSplit::PerformSplit</a></div><div class="ttdeci">static size_t PerformSplit(MatType &data, const size_t begin, const size_t count, const SplitInfo &splitInfo, std::vector< size_t > &oldFromNew)</div><div class="ttdoc">Perform the split process according to the information about the split and return the list of changed...</div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00101">rp_tree_max_split.hpp:101</a></div></div>
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<div class="ttc" id="classmlpack_1_1tree_1_1RPTreeMaxSplit_html_a85936c73cab84e8bee94aeb920b202a1"><div class="ttname"><a href="classmlpack_1_1tree_1_1RPTreeMaxSplit.html#a85936c73cab84e8bee94aeb920b202a1">mlpack::tree::RPTreeMaxSplit::ElemType</a></div><div class="ttdeci">MatType::elem_type ElemType</div><div class="ttdoc">The element type held by the matrix type. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00036">rp_tree_max_split.hpp:36</a></div></div>
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<div class="ttc" id="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo_html"><div class="ttname"><a href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html">mlpack::tree::RPTreeMaxSplit::SplitInfo</a></div><div class="ttdoc">An information about the partition. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00038">rp_tree_max_split.hpp:38</a></div></div>
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<div class="ttc" id="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo_html_aca60cf8641352ba284f72a17201e5f11"><div class="ttname"><a href="structmlpack_1_1tree_1_1RPTreeMaxSplit_1_1SplitInfo.html#aca60cf8641352ba284f72a17201e5f11">mlpack::tree::RPTreeMaxSplit::SplitInfo::splitVal</a></div><div class="ttdeci">ElemType splitVal</div><div class="ttdoc">The value according to which the node is being split. </div><div class="ttdef"><b>Definition:</b> <a href="rp__tree__max__split_8hpp_source.html#l00043">rp_tree_max_split.hpp:43</a></div></div>
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