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<a href="average__init_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_AMF_AVERAGE_INIT_HPP</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#define MLPACK_METHODS_AMF_AVERAGE_INIT_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>amf {</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1AverageInitialization.html"> 27</a></span> <span class="keyword">class </span><a class="code" href="classmlpack_1_1amf_1_1AverageInitialization.html">AverageInitialization</a></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">public</span>:</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="comment">// Empty constructor required for the InitializeRule template</span></div><div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1AverageInitialization.html#a2166518ff4e7320626c9618f20f84ec6"> 31</a></span>  <a class="code" href="classmlpack_1_1amf_1_1AverageInitialization.html#a2166518ff4e7320626c9618f20f84ec6">AverageInitialization</a>() { }</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keyword">template</span><<span class="keyword">typename</span> MatType></div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1AverageInitialization.html#a1cb87e810e7ae4867aeb4368184c1c22"> 43</a></span>  <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1amf_1_1AverageInitialization.html#a1cb87e810e7ae4867aeb4368184c1c22">Initialize</a>(<span class="keyword">const</span> MatType& V,</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> r,</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  arma::mat& W,</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  arma::mat& H)</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = V.n_rows;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> m = V.n_cols;</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>  <span class="keywordtype">double</span> avgV = 0;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">size_t</span> count = 0;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordtype">double</span> min = DBL_MAX;</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="comment">// Iterate over all elements in the matrix (for sparse matrices, this only</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// iterates over nonzeros).</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">for</span> (<span class="keyword">typename</span> MatType::const_row_col_iterator it = V.begin();</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  it != V.end(); ++it)</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  ++count;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  avgV += *it;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// Track the minimum value.</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">if</span> (*it < min)</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  min = *it;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  avgV = sqrt(((avgV / (n * m)) - min) / r);</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Initialize to random values.</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  W.randu(n, r);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  H.randu(r, m);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  W = W + avgV;</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  H = H + avgV;</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="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Archive></div><div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1AverageInitialization.html#a81f7902254f53d5208e10fe4560425f7"> 79</a></span>  <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1amf_1_1AverageInitialization.html#a81f7902254f53d5208e10fe4560425f7">Serialize</a>(Archive& <span class="comment">/* ar */</span>, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <span class="comment">/* version */</span>) { }</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> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> } <span class="comment">// namespace amf</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> } <span class="comment">// namespace mlpack</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#endif</span></div><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_1amf_1_1AverageInitialization_html"><div class="ttname"><a href="classmlpack_1_1amf_1_1AverageInitialization.html">mlpack::amf::AverageInitialization</a></div><div class="ttdoc">This initialization rule initializes matrix W and H to root of the average of V, perturbed with unifo...</div><div class="ttdef"><b>Definition:</b> <a href="average__init_8hpp_source.html#l00027">average_init.hpp:27</a></div></div>
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<div class="ttc" id="classmlpack_1_1amf_1_1AverageInitialization_html_a81f7902254f53d5208e10fe4560425f7"><div class="ttname"><a href="classmlpack_1_1amf_1_1AverageInitialization.html#a81f7902254f53d5208e10fe4560425f7">mlpack::amf::AverageInitialization::Serialize</a></div><div class="ttdeci">void Serialize(Archive &, const unsigned int)</div><div class="ttdoc">Serialize the object (in this case, there is nothing to do). </div><div class="ttdef"><b>Definition:</b> <a href="average__init_8hpp_source.html#l00079">average_init.hpp:79</a></div></div>
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<div class="ttc" id="classmlpack_1_1amf_1_1AverageInitialization_html_a1cb87e810e7ae4867aeb4368184c1c22"><div class="ttname"><a href="classmlpack_1_1amf_1_1AverageInitialization.html#a1cb87e810e7ae4867aeb4368184c1c22">mlpack::amf::AverageInitialization::Initialize</a></div><div class="ttdeci">static void Initialize(const MatType &V, const size_t r, arma::mat &W, arma::mat &H)</div><div class="ttdoc">Initialize the matrices W and H to the average value of V with uniform random noise added...</div><div class="ttdef"><b>Definition:</b> <a href="average__init_8hpp_source.html#l00043">average_init.hpp:43</a></div></div>
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<div class="ttc" id="classmlpack_1_1amf_1_1AverageInitialization_html_a2166518ff4e7320626c9618f20f84ec6"><div class="ttname"><a href="classmlpack_1_1amf_1_1AverageInitialization.html#a2166518ff4e7320626c9618f20f84ec6">mlpack::amf::AverageInitialization::AverageInitialization</a></div><div class="ttdeci">AverageInitialization()</div><div class="ttdef"><b>Definition:</b> <a href="average__init_8hpp_source.html#l00031">average_init.hpp:31</a></div></div>
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