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<h2 title="Class GDBOnTreesLearningStrategy" class="title">Class GDBOnTreesLearningStrategy</h2>
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<pre>public class <span class="typeNameLabel">GDBOnTreesLearningStrategy</span>
extends <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html" title="class in org.apache.ignite.ml.composition.boosting">GDBLearningStrategy</a></pre>
<div class="block">Gradient boosting on trees specific learning strategy reusing learning dataset with index between several learning
iterations.</div>
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<h3>Fields inherited from class&nbsp;org.apache.ignite.ml.composition.boosting.<a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html" title="class in org.apache.ignite.ml.composition.boosting">GDBLearningStrategy</a></h3>
<code><a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#baseMdlTrainerBuilder">baseMdlTrainerBuilder</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#checkConvergenceStgyFactory">checkConvergenceStgyFactory</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#cntOfIterations">cntOfIterations</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#compositionWeights">compositionWeights</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#envBuilder">envBuilder</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#externalLbToInternalMapping">externalLbToInternalMapping</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#loss">loss</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#meanLbVal">meanLbVal</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#sampleSize">sampleSize</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#trainerEnvironment">trainerEnvironment</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/ml/tree/boosting/GDBOnTreesLearningStrategy.html#GDBOnTreesLearningStrategy-boolean-">GDBOnTreesLearningStrategy</a></span>(boolean&nbsp;useIdx)</code>
<div class="block">Create an instance of learning strategy.</div>
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<td class="colFirst"><code><span class='angle_bracket'>&lt;</span>K,V<span class='angle_bracket'>&gt;</span>&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><span class='angle_bracket'>&lt;</span><a href="../../../../../../org/apache/ignite/ml/IgniteModel.html" title="interface in org.apache.ignite.ml">IgniteModel</a><span class='angle_bracket'>&lt;</span><a href="../../../../../../org/apache/ignite/ml/math/primitives/vector/Vector.html" title="interface in org.apache.ignite.ml.math.primitives.vector">Vector</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a><span class='angle_bracket'>&gt;</span><span class='angle_bracket'>&gt;</span></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/ml/tree/boosting/GDBOnTreesLearningStrategy.html#update-org.apache.ignite.ml.composition.boosting.GDBModel-org.apache.ignite.ml.dataset.DatasetBuilder-org.apache.ignite.ml.preprocessing.Preprocessor-">update</a></span>(<a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBModel.html" title="class in org.apache.ignite.ml.composition.boosting">GDBModel</a>&nbsp;mdlToUpdate,
<a href="../../../../../../org/apache/ignite/ml/dataset/DatasetBuilder.html" title="interface in org.apache.ignite.ml.dataset">DatasetBuilder</a><span class='angle_bracket'>&lt;</span>K,V<span class='angle_bracket'>&gt;</span>&nbsp;datasetBuilder,
<a href="../../../../../../org/apache/ignite/ml/preprocessing/Preprocessor.html" title="interface in org.apache.ignite.ml.preprocessing">Preprocessor</a><span class='angle_bracket'>&lt;</span>K,V<span class='angle_bracket'>&gt;</span>&nbsp;vectorizer)</code>
<div class="block">Gets state of model in arguments, compare it with training parameters of trainer and if they are fit then trainer
updates model in according to new data and return new model.</div>
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<code><a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#getCompositionWeights--">getCompositionWeights</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#getMeanValue--">getMeanValue</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#initLearningState-org.apache.ignite.ml.composition.boosting.GDBModel-">initLearningState</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#learnModels-org.apache.ignite.ml.dataset.DatasetBuilder-org.apache.ignite.ml.preprocessing.Preprocessor-">learnModels</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withBaseModelTrainerBuilder-org.apache.ignite.ml.math.functions.IgniteSupplier-">withBaseModelTrainerBuilder</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withCheckConvergenceStgyFactory-org.apache.ignite.ml.composition.boosting.convergence.ConvergenceCheckerFactory-">withCheckConvergenceStgyFactory</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withCntOfIterations-int-">withCntOfIterations</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withCompositionWeights-double:A-">withCompositionWeights</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withDefaultGradStepSize-double-">withDefaultGradStepSize</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withEnvironmentBuilder-org.apache.ignite.ml.environment.LearningEnvironmentBuilder-">withEnvironmentBuilder</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withExternalLabelToInternal-org.apache.ignite.ml.math.functions.IgniteFunction-">withExternalLabelToInternal</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withLossGradient-org.apache.ignite.ml.composition.boosting.loss.Loss-">withLossGradient</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withMeanLabelValue-double-">withMeanLabelValue</a>, <a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#withSampleSize-long-">withSampleSize</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>GDBOnTreesLearningStrategy</h4>
<pre>public&nbsp;GDBOnTreesLearningStrategy(boolean&nbsp;useIdx)</pre>
<div class="block">Create an instance of learning strategy.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>useIdx</code> - Use index.</dd>
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<h4>update</h4>
<pre>public&nbsp;<span class='angle_bracket'>&lt;</span>K,V<span class='angle_bracket'>&gt;</span>&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><span class='angle_bracket'>&lt;</span><a href="../../../../../../org/apache/ignite/ml/IgniteModel.html" title="interface in org.apache.ignite.ml">IgniteModel</a><span class='angle_bracket'>&lt;</span><a href="../../../../../../org/apache/ignite/ml/math/primitives/vector/Vector.html" title="interface in org.apache.ignite.ml.math.primitives.vector">Vector</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a><span class='angle_bracket'>&gt;</span><span class='angle_bracket'>&gt;</span>&nbsp;update(<a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBModel.html" title="class in org.apache.ignite.ml.composition.boosting">GDBModel</a>&nbsp;mdlToUpdate,
<a href="../../../../../../org/apache/ignite/ml/dataset/DatasetBuilder.html" title="interface in org.apache.ignite.ml.dataset">DatasetBuilder</a><span class='angle_bracket'>&lt;</span>K,V<span class='angle_bracket'>&gt;</span>&nbsp;datasetBuilder,
<a href="../../../../../../org/apache/ignite/ml/preprocessing/Preprocessor.html" title="interface in org.apache.ignite.ml.preprocessing">Preprocessor</a><span class='angle_bracket'>&lt;</span>K,V<span class='angle_bracket'>&gt;</span>&nbsp;vectorizer)</pre>
<div class="block">Gets state of model in arguments, compare it with training parameters of trainer and if they are fit then trainer
updates model in according to new data and return new model. In other case trains new model.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html#update-org.apache.ignite.ml.composition.boosting.GDBModel-org.apache.ignite.ml.dataset.DatasetBuilder-org.apache.ignite.ml.preprocessing.Preprocessor-">update</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/ignite/ml/composition/boosting/GDBLearningStrategy.html" title="class in org.apache.ignite.ml.composition.boosting">GDBLearningStrategy</a></code></dd>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>K</code> - Type of a key in <code>upstream</code> data.</dd>
<dd><code>V</code> - Type of a value in <code>upstream</code> data.</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>mdlToUpdate</code> - Learned model.</dd>
<dd><code>datasetBuilder</code> - Dataset builder.</dd>
<dd><code>vectorizer</code> - Upstream preprocessor.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Updated models list.</dd>
</dl>
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