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<pre>public interface <span class="strong">Params</span>
extends <a href="../../../../../org/apache/spark/ml/util/Identifiable.html" title="interface in org.apache.spark.ml.util">Identifiable</a>, scala.Serializable</pre>
<div class="block">:: DeveloperApi ::
Trait for components that take parameters. This also provides an internal param map to store
parameter values attached to the instance.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#clear(org.apache.spark.ml.param.Param)">clear</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</code>
<div class="block">Clears the user-supplied value for the input param.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#copy(org.apache.spark.ml.param.ParamMap)">copy</a></strong>(<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</code>
<div class="block">Creates a copy of this instance with the same UID and some extra params.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><T extends <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a>> <br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#copyValues(T, org.apache.spark.ml.param.ParamMap)">copyValues</a></strong>(T to,
<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</code>
<div class="block">Copies param values from this instance to another instance for params shared by them.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><T extends <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a>> <br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#defaultCopy(org.apache.spark.ml.param.ParamMap)">defaultCopy</a></strong>(<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</code>
<div class="block">Default implementation of copy with extra params.</div>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#defaultParamMap()">defaultParamMap</a></strong>()</code>
<div class="block">Internal param map for default values.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#explainParam(org.apache.spark.ml.param.Param)">explainParam</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</code>
<div class="block">Explains a param.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#explainParams()">explainParams</a></strong>()</code>
<div class="block">Explains all params of this instance.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#extractParamMap()">extractParamMap</a></strong>()</code>
<div class="block"><code>extractParamMap</code> with no extra values.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#extractParamMap(org.apache.spark.ml.param.ParamMap)">extractParamMap</a></strong>(<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</code>
<div class="block">Extracts the embedded default param values and user-supplied values, and then merges them with
extra values from input into a flat param map, where the latter value is used if there exist
conflicts, i.e., with ordering: default param values < user-supplied values < extra.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><T> scala.Option<T></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#get(org.apache.spark.ml.param.Param)">get</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</code>
<div class="block">Optionally returns the user-supplied value of a param.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><T> scala.Option<T></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#getDefault(org.apache.spark.ml.param.Param)">getDefault</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</code>
<div class="block">Gets the default value of a parameter.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><T> T</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#getOrDefault(org.apache.spark.ml.param.Param)">getOrDefault</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</code>
<div class="block">Gets the value of a param in the embedded param map or its default value.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><java.lang.Object></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#getParam(java.lang.String)">getParam</a></strong>(java.lang.String paramName)</code>
<div class="block">Gets a param by its name.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><T> boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#hasDefault(org.apache.spark.ml.param.Param)">hasDefault</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</code>
<div class="block">Tests whether the input param has a default value set.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#hasParam(java.lang.String)">hasParam</a></strong>(java.lang.String paramName)</code>
<div class="block">Tests whether this instance contains a param with a given name.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#isDefined(org.apache.spark.ml.param.Param)">isDefined</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</code>
<div class="block">Checks whether a param is explicitly set or has a default value.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#isSet(org.apache.spark.ml.param.Param)">isSet</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</code>
<div class="block">Checks whether a param is explicitly set.</div>
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<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#paramMap()">paramMap</a></strong>()</code>
<div class="block">Internal param map for user-supplied values.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?>[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#params()">params</a></strong>()</code>
<div class="block">Returns all params sorted by their names.</div>
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<tr class="rowColor">
<td class="colFirst"><code><T> <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#set(org.apache.spark.ml.param.Param, T)">set</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param,
T value)</code>
<div class="block">Sets a parameter in the embedded param map.</div>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#set(org.apache.spark.ml.param.ParamPair)">set</a></strong>(<a href="../../../../../org/apache/spark/ml/param/ParamPair.html" title="class in org.apache.spark.ml.param">ParamPair</a><?> paramPair)</code>
<div class="block">Sets a parameter in the embedded param map.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#set(java.lang.String, java.lang.Object)">set</a></strong>(java.lang.String param,
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<div class="block">Sets a parameter (by name) in the embedded param map.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><T> <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#setDefault(org.apache.spark.ml.param.Param, T)">setDefault</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param,
T value)</code>
<div class="block">Sets a default value for a param.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#setDefault(scala.collection.Seq)">setDefault</a></strong>(scala.collection.Seq<<a href="../../../../../org/apache/spark/ml/param/ParamPair.html" title="class in org.apache.spark.ml.param">ParamPair</a><?>> paramPairs)</code>
<div class="block">Sets default values for a list of params.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#shouldOwn(org.apache.spark.ml.param.Param)">shouldOwn</a></strong>(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</code>
<div class="block">Validates that the input param belongs to this instance.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/param/Params.html#validateParams()">validateParams</a></strong>()</code>
<div class="block">Validates parameter values stored internally.</div>
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<code><a href="../../../../../org/apache/spark/ml/util/Identifiable.html#toString()">toString</a>, <a href="../../../../../org/apache/spark/ml/util/Identifiable.html#uid()">uid</a></code></li>
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<pre><a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?>[] params()</pre>
<div class="block">Returns all params sorted by their names. The default implementation uses Java reflection to
list all public methods that have no arguments and return <a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param"><code>Param</code></a>.
<p>
Note: Developer should not use this method in constructor because we cannot guarantee that
this variable gets initialized before other params.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>void validateParams()</pre>
<div class="block">Validates parameter values stored internally.
Raise an exception if any parameter value is invalid.
<p>
This only needs to check for interactions between parameters.
Parameter value checks which do not depend on other parameters are handled by
<code>Param.validate()</code>. This method does not handle input/output column parameters;
those are checked during schema validation.</div>
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<pre>java.lang.String explainParam(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</pre>
<div class="block">Explains a param.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - input param, must belong to this instance.</dd>
<dt><span class="strong">Returns:</span></dt><dd>a string that contains the input param name, doc, and optionally its default value and
the user-supplied value</dd></dl>
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<pre>java.lang.String explainParams()</pre>
<div class="block">Explains all params of this instance.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd><dt><span class="strong">See Also:</span></dt><dd><code>explainParam()</code></dd></dl>
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<pre>boolean isSet(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</pre>
<div class="block">Checks whether a param is explicitly set.</div>
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<pre>boolean isDefined(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</pre>
<div class="block">Checks whether a param is explicitly set or has a default value.</div>
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<pre>boolean hasParam(java.lang.String paramName)</pre>
<div class="block">Tests whether this instance contains a param with a given name.</div>
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<pre><a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><java.lang.Object> getParam(java.lang.String paramName)</pre>
<div class="block">Gets a param by its name.</div>
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<pre><T> <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> set(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param,
T value)</pre>
<div class="block">Sets a parameter in the embedded param map.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd><dd><code>value</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> set(java.lang.String param,
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<div class="block">Sets a parameter (by name) in the embedded param map.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd><dd><code>value</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> set(<a href="../../../../../org/apache/spark/ml/param/ParamPair.html" title="class in org.apache.spark.ml.param">ParamPair</a><?> paramPair)</pre>
<div class="block">Sets a parameter in the embedded param map.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>paramPair</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><T> scala.Option<T> get(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</pre>
<div class="block">Optionally returns the user-supplied value of a param.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> clear(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</pre>
<div class="block">Clears the user-supplied value for the input param.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><T> T getOrDefault(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</pre>
<div class="block">Gets the value of a param in the embedded param map or its default value. Throws an exception
if neither is set.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><T> <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> setDefault(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param,
T value)</pre>
<div class="block">Sets a default value for a param.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - param to set the default value. Make sure that this param is initialized before
this method gets called.</dd><dd><code>value</code> - the default value</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> setDefault(scala.collection.Seq<<a href="../../../../../org/apache/spark/ml/param/ParamPair.html" title="class in org.apache.spark.ml.param">ParamPair</a><?>> paramPairs)</pre>
<div class="block">Sets default values for a list of params.
<p>
Note: Java developers should use the single-parameter <code>setDefault()</code>.
Annotating this with varargs can cause compilation failures due to a Scala compiler bug.
See SPARK-9268.
<p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>paramPairs</code> - a list of param pairs that specify params and their default values to set
respectively. Make sure that the params are initialized before this method
gets called.</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><T> scala.Option<T> getDefault(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</pre>
<div class="block">Gets the default value of a parameter.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><T> boolean hasDefault(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><T> param)</pre>
<div class="block">Tests whether the input param has a default value set.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>param</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a> copy(<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</pre>
<div class="block">Creates a copy of this instance with the same UID and some extra params.
Subclasses should implement this method and set the return type properly.
<p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>extra</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd><dt><span class="strong">See Also:</span></dt><dd><code>defaultCopy()</code></dd></dl>
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<pre><T extends <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a>> T defaultCopy(<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</pre>
<div class="block">Default implementation of copy with extra params.
It tries to create a new instance with the same UID.
Then it copies the embedded and extra parameters over and returns the new instance.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>extra</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extractParamMap(<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</pre>
<div class="block">Extracts the embedded default param values and user-supplied values, and then merges them with
extra values from input into a flat param map, where the latter value is used if there exist
conflicts, i.e., with ordering: default param values < user-supplied values < extra.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>extra</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extractParamMap()</pre>
<div class="block"><code>extractParamMap</code> with no extra values.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<h4>paramMap</h4>
<pre><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> paramMap()</pre>
<div class="block">Internal param map for user-supplied values.</div>
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<h4>defaultParamMap</h4>
<pre><a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> defaultParamMap()</pre>
<div class="block">Internal param map for default values.</div>
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<pre>void shouldOwn(<a href="../../../../../org/apache/spark/ml/param/Param.html" title="class in org.apache.spark.ml.param">Param</a><?> param)</pre>
<div class="block">Validates that the input param belongs to this instance.</div>
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<h4>copyValues</h4>
<pre><T extends <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a>> T copyValues(T to,
<a href="../../../../../org/apache/spark/ml/param/ParamMap.html" title="class in org.apache.spark.ml.param">ParamMap</a> extra)</pre>
<div class="block">Copies param values from this instance to another instance for params shared by them.
<p>
This handles default Params and explicitly set Params separately.
Default Params are copied from and to <code>defaultParamMap</code>, and explicitly set Params are
copied from and to <code>paramMap</code>.
Warning: This implicitly assumes that this <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param"><code>Params</code></a> instance and the target instance
share the same set of default Params.
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>to</code> - the target instance, which should work with the same set of default Params as this
source instance</dd><dd><code>extra</code> - extra params to be copied to the target's <code>paramMap</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the target instance with param values copied</dd></dl>
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