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<a href="random__acol__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_LMF_RANDOM_ACOL_INIT_HPP</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#define MLPACK_METHODS_LMF_RANDOM_ACOL_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> <span class="preprocessor">#include <<a class="code" href="random_8hpp.html">mlpack/core/math/random.hpp</a>></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span><a class="code" href="namespacemlpack.html">mlpack</a> {</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>amf {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">template</span><<span class="keywordtype">size_t</span> columnsToAverage = 5></div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html"> 44</a></span> <span class="keyword">class </span><a class="code" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html">RandomAcolInitialization</a></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> {</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// Empty constructor required for the InitializeRule template</span></div><div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#a5a66d72ff9270603b9296168527329c9"> 48</a></span>  <a class="code" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#a5a66d72ff9270603b9296168527329c9">RandomAcolInitialization</a>()</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  { }</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="keyword">template</span><<span class="keyword">typename</span> MatType></div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#af54f1e4efe3501ded05786889d1e3809"> 52</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_1RandomAcolInitialization.html#af54f1e4efe3501ded05786889d1e3809">Initialize</a>(<span class="keyword">const</span> MatType& V,</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> r,</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  arma::mat& W,</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  arma::mat& H)</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  {</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = V.n_rows;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> m = V.n_cols;</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>  <span class="keywordflow">if</span> (columnsToAverage > m)</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>  <a class="code" href="classmlpack_1_1Log.html#abbf3c5ac36654c0a8f17be3549388b38">Log::Warn</a> << <span class="stringliteral">"Number of random columns (columnsToAverage) is more than "</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  << <span class="stringliteral">"the number of columns available in the V matrix; weird results "</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  << <span class="stringliteral">"may ensue!"</span> << std::endl;</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>  W.zeros(n, 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 W matrix with random columns.</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> col = 0; col < r; col++)</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> randCol = 0; randCol < columnsToAverage; randCol++)</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>  <span class="comment">// .col() does not work in this case, as of Armadillo 3.920.</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  W.unsafe_col(col) += V.col(<a class="code" href="namespacemlpack_1_1math.html#aad090ac225728d74c1b66bcf52f3ab95">math::RandInt</a>(0, m));</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">// Now divide by p.</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  W /= columnsToAverage;</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">// Initialize H to random values.</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  H.randu(r, m);</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> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Archive></div><div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#a70e4b426849db310e9cdb228259a63ef"> 88</a></span>  <span class="keywordtype">void</span> <a class="code" href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#a70e4b426849db310e9cdb228259a63ef">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="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">// namespace amf</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> } <span class="comment">// namespace mlpack</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</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_1RandomAcolInitialization_html_af54f1e4efe3501ded05786889d1e3809"><div class="ttname"><a href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#af54f1e4efe3501ded05786889d1e3809">mlpack::amf::RandomAcolInitialization::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="ttdef"><b>Definition:</b> <a href="random__acol__init_8hpp_source.html#l00052">random_acol_init.hpp:52</a></div></div>
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<div class="ttc" id="classmlpack_1_1Log_html_abbf3c5ac36654c0a8f17be3549388b38"><div class="ttname"><a href="classmlpack_1_1Log.html#abbf3c5ac36654c0a8f17be3549388b38">mlpack::Log::Warn</a></div><div class="ttdeci">static MLPACK_EXPORT util::PrefixedOutStream Warn</div><div class="ttdoc">Prints warning messages prefixed with [WARN ]. </div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00087">log.hpp:87</a></div></div>
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<div class="ttc" id="random_8hpp_html"><div class="ttname"><a href="random_8hpp.html">random.hpp</a></div><div class="ttdoc">Miscellaneous math random-related routines. </div></div>
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<div class="ttc" id="classmlpack_1_1amf_1_1RandomAcolInitialization_html_a70e4b426849db310e9cdb228259a63ef"><div class="ttname"><a href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#a70e4b426849db310e9cdb228259a63ef">mlpack::amf::RandomAcolInitialization::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 serialize). </div><div class="ttdef"><b>Definition:</b> <a href="random__acol__init_8hpp_source.html#l00088">random_acol_init.hpp:88</a></div></div>
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<div class="ttc" id="classmlpack_1_1amf_1_1RandomAcolInitialization_html"><div class="ttname"><a href="classmlpack_1_1amf_1_1RandomAcolInitialization.html">mlpack::amf::RandomAcolInitialization</a></div><div class="ttdoc">This class initializes the W matrix of the AMF algorithm by averaging p randomly chosen columns of V...</div><div class="ttdef"><b>Definition:</b> <a href="random__acol__init_8hpp_source.html#l00044">random_acol_init.hpp:44</a></div></div>
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<div class="ttc" id="namespacemlpack_1_1math_html_aad090ac225728d74c1b66bcf52f3ab95"><div class="ttname"><a href="namespacemlpack_1_1math.html#aad090ac225728d74c1b66bcf52f3ab95">mlpack::math::RandInt</a></div><div class="ttdeci">int RandInt(const int hiExclusive)</div><div class="ttdoc">Generates a uniform random integer. </div><div class="ttdef"><b>Definition:</b> <a href="random_8hpp_source.html#l00071">random.hpp:71</a></div></div>
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<div class="ttc" id="classmlpack_1_1amf_1_1RandomAcolInitialization_html_a5a66d72ff9270603b9296168527329c9"><div class="ttname"><a href="classmlpack_1_1amf_1_1RandomAcolInitialization.html#a5a66d72ff9270603b9296168527329c9">mlpack::amf::RandomAcolInitialization::RandomAcolInitialization</a></div><div class="ttdeci">RandomAcolInitialization()</div><div class="ttdef"><b>Definition:</b> <a href="random__acol__init_8hpp_source.html#l00048">random_acol_init.hpp:48</a></div></div>
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