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<tr class="memitem:a0454ce176a98fcf408d42c3e540385d7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="namespaceLEARNER.html#a807843d5185e0c5005a54bf28c111c79">LEARNER::base_learner</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="boosting_8h.html#a0454ce176a98fcf408d42c3e540385d7">boosting_setup</a> (<a class="el" href="structVW_1_1config_1_1options__i.html">VW::config::options_i</a> &options, <a class="el" href="structvw.html">vw</a> &all)</td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#a0454ce176a98fcf408d42c3e540385d7">◆ </a></span>boosting_setup()</h2>
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<td class="memname"><a class="el" href="namespaceLEARNER.html#a807843d5185e0c5005a54bf28c111c79">LEARNER::base_learner</a>* boosting_setup </td>
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<p class="definition">Definition at line <a class="el" href="boosting_8cc_source.html#l00396">396</a> of file <a class="el" href="boosting_8cc_source.html">boosting.cc</a>.</p>
<p class="reference">References <a class="el" href="kernel__svm_8cc_source.html#l00546">add()</a>, <a class="el" href="structVW_1_1config_1_1options__i.html#a93c0de6c3ad57f6fb57441af2c908ba5">VW::config::options_i::add_and_parse()</a>, <a class="el" href="learner_8h_source.html#l00476">LEARNER::as_singleline()</a>, <a class="el" href="cache_8cc_source.html#l00040">f</a>, <a class="el" href="global__data_8h_source.html#l00553">vw::get_random_state()</a>, <a class="el" href="learner_8h_source.html#l00462">LEARNER::make_base()</a>, <a class="el" href="options_8h_source.html#l00080">VW::config::make_option()</a>, <a class="el" href="global__data_8h_source.html#l00487">vw::quiet</a>, <a class="el" href="boosting_8cc_source.html#l00353">return_example()</a>, <a class="el" href="boosting_8cc_source.html#l00359">save_load()</a>, <a class="el" href="boosting_8cc_source.html#l00295">save_load_sampling()</a>, <a class="el" href="learner_8h_source.html#l00257">LEARNER::learner< T, E >::set_save_load()</a>, <a class="el" href="parse__args_8cc_source.html#l01222">setup_base()</a>, <a class="el" href="vw__exception_8h_source.html#l00181">THROW</a>, and <a class="el" href="structVW_1_1config_1_1options__i.html#ab5171ac33158fca4580d3f0658c4929e">VW::config::options_i::was_supplied()</a>.</p>
<p class="reference">Referenced by <a class="el" href="parse__args_8cc_source.html#l01234">parse_reductions()</a>.</p>
<div class="fragment"><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> {</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <a class="code" href="memory_8h.html#a4dbd8ec0fd15b599650458cdf2b3f1bf">free_ptr<boosting></a> data = scoped_calloc_or_throw<boosting>();</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <a class="code" href="structVW_1_1config_1_1option__group__definition.html">option_group_definition</a> new_options(<span class="stringliteral">"Boosting"</span>);</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  new_options.add(<a class="code" href="namespaceVW_1_1config.html#ae768389a49d24d07215612b2f824d520">make_option</a>(<span class="stringliteral">"boosting"</span>, data->N).keep().help(<span class="stringliteral">"Online boosting with <N> weak learners"</span>))</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  .<a class="code" href="kernel__svm_8cc.html#a907b9ad55bf6f8e61a6385bc9599fc0f">add</a>(<a class="code" href="namespaceVW_1_1config.html#ae768389a49d24d07215612b2f824d520">make_option</a>(<span class="stringliteral">"gamma"</span>, data->gamma)</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  .default_value(0.1<a class="code" href="cache_8cc.html#af900396d7b72ff2a7002e8befe8cf8f1">f</a>)</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  .help(<span class="stringliteral">"weak learner's edge (=0.1), used only by online BBM"</span>))</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  .<a class="code" href="kernel__svm_8cc.html#a907b9ad55bf6f8e61a6385bc9599fc0f">add</a>(</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <a class="code" href="namespaceVW_1_1config.html#ae768389a49d24d07215612b2f824d520">make_option</a>(<span class="stringliteral">"alg"</span>, data->alg)</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  .keep()</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  .default_value(<span class="stringliteral">"BBM"</span>)</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  .help(<span class="stringliteral">"specify the boosting algorithm: BBM (default), logistic (AdaBoost.OL.W), adaptive (AdaBoost.OL)"</span>));</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  options.<a class="code" href="structVW_1_1config_1_1options__i.html#a93c0de6c3ad57f6fb57441af2c908ba5">add_and_parse</a>(new_options);</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> </div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keywordflow">if</span> (!options.<a class="code" href="structVW_1_1config_1_1options__i.html#ab5171ac33158fca4580d3f0658c4929e">was_supplied</a>(<span class="stringliteral">"boosting"</span>))</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> </div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="comment">// Description of options:</span></div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="comment">// "BBM" implements online BBM (Algorithm 1 in BLK'15)</span></div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="comment">// "logistic" implements AdaBoost.OL.W (importance weighted version</span></div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="comment">// of Algorithm 2 in BLK'15)</span></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="comment">// "adaptive" implements AdaBoost.OL (Algorithm 2 in BLK'15,</span></div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="comment">// using sampling rather than importance weighting)</span></div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> </div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keywordflow">if</span> (!all.<a class="code" href="structvw.html#a8d6005eb2b5f1b744d3979852475a73b">quiet</a>)</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  cerr << <span class="stringliteral">"Number of weak learners = "</span> << data->N << endl;</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">if</span> (!all.<a class="code" href="structvw.html#a8d6005eb2b5f1b744d3979852475a73b">quiet</a>)</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  cerr << <span class="stringliteral">"Gamma = "</span> << data->gamma << endl;</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  data->C = std::vector<std::vector<int64_t> >(data->N, std::vector<int64_t>(data->N, -1));</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  data->t = 0;</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  data->all = &all;</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  data->_random_state = all.<a class="code" href="structvw.html#a30bca3f2116b0b7db82d60c76467f6c4">get_random_state</a>();</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  data->alpha = std::vector<float>(data->N, 0);</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  data->v = std::vector<float>(data->N, 1);</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <a class="code" href="structLEARNER_1_1learner.html">learner<boosting, example></a>* l;</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">if</span> (data->alg == <span class="stringliteral">"BBM"</span>)</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  l = &init_learner<boosting, example>(</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  data, <a class="code" href="namespaceLEARNER.html#abd71c87941b752738319b3d1ed64fe47">as_singleline</a>(<a class="code" href="parse__args_8cc.html#a34c806099b7857a0ffc630bc8142beba">setup_base</a>(options, all)), predict_or_learn<true>, predict_or_learn<false>, data->N);</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (data->alg == <span class="stringliteral">"logistic"</span>)</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  {</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  l = &init_learner<boosting, example>(data, <a class="code" href="namespaceLEARNER.html#abd71c87941b752738319b3d1ed64fe47">as_singleline</a>(<a class="code" href="parse__args_8cc.html#a34c806099b7857a0ffc630bc8142beba">setup_base</a>(options, all)), predict_or_learn_logistic<true>,</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  predict_or_learn_logistic<false>, data->N);</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  l-><a class="code" href="structLEARNER_1_1learner.html#a144e508faabaa6fb833330f678f350c1">set_save_load</a>(<a class="code" href="boosting_8cc.html#a97334ffe8962b0f99d5d23261aae1c58">save_load</a>);</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  }</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (data->alg == <span class="stringliteral">"adaptive"</span>)</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  {</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  l = &init_learner<boosting, example>(data, <a class="code" href="namespaceLEARNER.html#abd71c87941b752738319b3d1ed64fe47">as_singleline</a>(<a class="code" href="parse__args_8cc.html#a34c806099b7857a0ffc630bc8142beba">setup_base</a>(options, all)), predict_or_learn_adaptive<true>,</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  predict_or_learn_adaptive<false>, data->N);</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  l->set_save_load(<a class="code" href="boosting_8cc.html#acda1eed56d13159e80c1ea872a0b0d25">save_load_sampling</a>);</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  }</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <a class="code" href="vw__exception_8h.html#a6418ba1768107875abafe9a0b6b8b2ad">THROW</a>(<span class="stringliteral">"Unrecognized boosting algorithm: \'"</span> << data->alg << <span class="stringliteral">"\' Bailing!"</span>);</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> </div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  l->set_finish_example(<a class="code" href="boosting_8cc.html#a1803181d51dc471af04b8d3b104636b0">return_example</a>);</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceLEARNER.html#abcf6bdc2fa5e38928c33212e20dbbd74">make_base</a>(*l);</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span> }</div><div class="ttc" id="namespaceLEARNER_html_abcf6bdc2fa5e38928c33212e20dbbd74"><div class="ttname"><a href="namespaceLEARNER.html#abcf6bdc2fa5e38928c33212e20dbbd74">LEARNER::make_base</a></div><div class="ttdeci">base_learner * make_base(learner< T, E > &base)</div><div class="ttdef"><b>Definition:</b> <a href="learner_8h_source.html#l00462">learner.h:462</a></div></div>
<div class="ttc" id="structVW_1_1config_1_1option__group__definition_html"><div class="ttname"><a href="structVW_1_1config_1_1option__group__definition.html">VW::config::option_group_definition</a></div><div class="ttdef"><b>Definition:</b> <a href="options_8h_source.html#l00085">options.h:85</a></div></div>
<div class="ttc" id="structvw_html_a8d6005eb2b5f1b744d3979852475a73b"><div class="ttname"><a href="structvw.html#a8d6005eb2b5f1b744d3979852475a73b">vw::quiet</a></div><div class="ttdeci">bool quiet</div><div class="ttdef"><b>Definition:</b> <a href="global__data_8h_source.html#l00487">global_data.h:487</a></div></div>
<div class="ttc" id="structVW_1_1config_1_1options__i_html_a93c0de6c3ad57f6fb57441af2c908ba5"><div class="ttname"><a href="structVW_1_1config_1_1options__i.html#a93c0de6c3ad57f6fb57441af2c908ba5">VW::config::options_i::add_and_parse</a></div><div class="ttdeci">virtual void add_and_parse(const option_group_definition &group)=0</div></div>
<div class="ttc" id="structLEARNER_1_1learner_html_a144e508faabaa6fb833330f678f350c1"><div class="ttname"><a href="structLEARNER_1_1learner.html#a144e508faabaa6fb833330f678f350c1">LEARNER::learner::set_save_load</a></div><div class="ttdeci">void set_save_load(void(*sl)(T &, io_buf &, bool, bool))</div><div class="ttdef"><b>Definition:</b> <a href="learner_8h_source.html#l00257">learner.h:257</a></div></div>
<div class="ttc" id="boosting_8cc_html_a97334ffe8962b0f99d5d23261aae1c58"><div class="ttname"><a href="boosting_8cc.html#a97334ffe8962b0f99d5d23261aae1c58">save_load</a></div><div class="ttdeci">void save_load(boosting &o, io_buf &model_file, bool read, bool text)</div><div class="ttdef"><b>Definition:</b> <a href="boosting_8cc_source.html#l00359">boosting.cc:359</a></div></div>
<div class="ttc" id="structLEARNER_1_1learner_html"><div class="ttname"><a href="structLEARNER_1_1learner.html">LEARNER::learner</a></div><div class="ttdef"><b>Definition:</b> <a href="cb__explore_8h_source.html#l00011">cb_explore.h:11</a></div></div>
<div class="ttc" id="structvw_html_a30bca3f2116b0b7db82d60c76467f6c4"><div class="ttname"><a href="structvw.html#a30bca3f2116b0b7db82d60c76467f6c4">vw::get_random_state</a></div><div class="ttdeci">std::shared_ptr< rand_state > get_random_state()</div><div class="ttdef"><b>Definition:</b> <a href="global__data_8h_source.html#l00553">global_data.h:553</a></div></div>
<div class="ttc" id="memory_8h_html_a4dbd8ec0fd15b599650458cdf2b3f1bf"><div class="ttname"><a href="memory_8h.html#a4dbd8ec0fd15b599650458cdf2b3f1bf">free_ptr</a></div><div class="ttdeci">std::unique_ptr< T, free_fn > free_ptr</div><div class="ttdef"><b>Definition:</b> <a href="memory_8h_source.html#l00034">memory.h:34</a></div></div>
<div class="ttc" id="namespaceLEARNER_html_abd71c87941b752738319b3d1ed64fe47"><div class="ttname"><a href="namespaceLEARNER.html#abd71c87941b752738319b3d1ed64fe47">LEARNER::as_singleline</a></div><div class="ttdeci">single_learner * as_singleline(learner< T, E > *l)</div><div class="ttdef"><b>Definition:</b> <a href="learner_8h_source.html#l00476">learner.h:476</a></div></div>
<div class="ttc" id="boosting_8cc_html_a1803181d51dc471af04b8d3b104636b0"><div class="ttname"><a href="boosting_8cc.html#a1803181d51dc471af04b8d3b104636b0">return_example</a></div><div class="ttdeci">void return_example(vw &all, boosting &, example &ec)</div><div class="ttdef"><b>Definition:</b> <a href="boosting_8cc_source.html#l00353">boosting.cc:353</a></div></div>
<div class="ttc" id="structVW_1_1config_1_1options__i_html_ab5171ac33158fca4580d3f0658c4929e"><div class="ttname"><a href="structVW_1_1config_1_1options__i.html#ab5171ac33158fca4580d3f0658c4929e">VW::config::options_i::was_supplied</a></div><div class="ttdeci">virtual bool was_supplied(const std::string &key)=0</div></div>
<div class="ttc" id="kernel__svm_8cc_html_a907b9ad55bf6f8e61a6385bc9599fc0f"><div class="ttname"><a href="kernel__svm_8cc.html#a907b9ad55bf6f8e61a6385bc9599fc0f">add</a></div><div class="ttdeci">int add(svm_params &params, svm_example *fec)</div><div class="ttdef"><b>Definition:</b> <a href="kernel__svm_8cc_source.html#l00546">kernel_svm.cc:546</a></div></div>
<div class="ttc" id="boosting_8cc_html_acda1eed56d13159e80c1ea872a0b0d25"><div class="ttname"><a href="boosting_8cc.html#acda1eed56d13159e80c1ea872a0b0d25">save_load_sampling</a></div><div class="ttdeci">void save_load_sampling(boosting &o, io_buf &model_file, bool read, bool text)</div><div class="ttdef"><b>Definition:</b> <a href="boosting_8cc_source.html#l00295">boosting.cc:295</a></div></div>
<div class="ttc" id="namespaceVW_1_1config_html_ae768389a49d24d07215612b2f824d520"><div class="ttname"><a href="namespaceVW_1_1config.html#ae768389a49d24d07215612b2f824d520">VW::config::make_option</a></div><div class="ttdeci">typed_option< T > make_option(std::string name, T &location)</div><div class="ttdef"><b>Definition:</b> <a href="options_8h_source.html#l00080">options.h:80</a></div></div>
<div class="ttc" id="parse__args_8cc_html_a34c806099b7857a0ffc630bc8142beba"><div class="ttname"><a href="parse__args_8cc.html#a34c806099b7857a0ffc630bc8142beba">setup_base</a></div><div class="ttdeci">LEARNER::base_learner * setup_base(options_i &options, vw &all)</div><div class="ttdef"><b>Definition:</b> <a href="parse__args_8cc_source.html#l01222">parse_args.cc:1222</a></div></div>
<div class="ttc" id="vw__exception_8h_html_a6418ba1768107875abafe9a0b6b8b2ad"><div class="ttname"><a href="vw__exception_8h.html#a6418ba1768107875abafe9a0b6b8b2ad">THROW</a></div><div class="ttdeci">#define THROW(args)</div><div class="ttdef"><b>Definition:</b> <a href="vw__exception_8h_source.html#l00181">vw_exception.h:181</a></div></div>
<div class="ttc" id="cache_8cc_html_af900396d7b72ff2a7002e8befe8cf8f1"><div class="ttname"><a href="cache_8cc.html#af900396d7b72ff2a7002e8befe8cf8f1">f</a></div><div class="ttdeci">float f</div><div class="ttdef"><b>Definition:</b> <a href="cache_8cc_source.html#l00040">cache.cc:40</a></div></div>
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