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<div class="subTitle">org.apache.spark.ml.feature</div>
<h2 title="Class VectorSlicer" class="title">Class VectorSlicer</h2>
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<li>java.lang.Object</li>
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<li><a href="../../../../../org/apache/spark/ml/PipelineStage.html" title="class in org.apache.spark.ml">org.apache.spark.ml.PipelineStage</a></li>
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<li>org.apache.spark.ml.feature.VectorSlicer</li>
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<dt>All Implemented Interfaces:</dt>
<dd>java.io.Serializable, <a href="../../../../../org/apache/spark/Logging.html" title="interface in org.apache.spark">Logging</a>, <a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a>, <a href="../../../../../org/apache/spark/ml/util/Identifiable.html" title="interface in org.apache.spark.ml.util">Identifiable</a></dd>
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<pre>public final class <span class="strong">VectorSlicer</span>
extends <a href="../../../../../org/apache/spark/ml/Transformer.html" title="class in org.apache.spark.ml">Transformer</a></pre>
<div class="block">:: Experimental ::
This class takes a feature vector and outputs a new feature vector with a subarray of the
original features.
<p>
The subset of features can be specified with either indices (<code>setIndices()</code>)
or names (<code>setNames()</code>). At least one feature must be selected. Duplicate features
are not allowed, so there can be no overlap between selected indices and names.
<p>
The output vector will order features with the selected indices first (in the order given),
followed by the selected names (in the order given).</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../serialized-form.html#org.apache.spark.ml.feature.VectorSlicer">Serialized Form</a></dd></dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#VectorSlicer()">VectorSlicer</a></strong>()</code> </td>
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<tr class="rowColor">
<td class="colOne"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#VectorSlicer(java.lang.String)">VectorSlicer</a></strong>(java.lang.String uid)</code> </td>
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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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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.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="rowColor">
<td class="colFirst"><code>int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#getIndices()">getIndices</a></strong>()</code> </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/feature/VectorSlicer.html#getNames()">getNames</a></strong>()</code> </td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/IntArrayParam.html" title="class in org.apache.spark.ml.param">IntArrayParam</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#indices()">indices</a></strong>()</code>
<div class="block">An array of indices to select features from a vector column.</div>
</td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/param/StringArrayParam.html" title="class in org.apache.spark.ml.param">StringArrayParam</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#names()">names</a></strong>()</code>
<div class="block">An array of feature names to select features from a vector column.</div>
</td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#setIndices(int[])">setIndices</a></strong>(int[] value)</code> </td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#setInputCol(java.lang.String)">setInputCol</a></strong>(java.lang.String value)</code> </td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#setNames(java.lang.String[])">setNames</a></strong>(java.lang.String[] value)</code> </td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#setOutputCol(java.lang.String)">setOutputCol</a></strong>(java.lang.String value)</code> </td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/sql/DataFrame.html" title="class in org.apache.spark.sql">DataFrame</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#transform(org.apache.spark.sql.DataFrame)">transform</a></strong>(<a href="../../../../../org/apache/spark/sql/DataFrame.html" title="class in org.apache.spark.sql">DataFrame</a> dataset)</code>
<div class="block">Transforms the input dataset.</div>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/sql/types/StructType.html" title="class in org.apache.spark.sql.types">StructType</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#transformSchema(org.apache.spark.sql.types.StructType)">transformSchema</a></strong>(<a href="../../../../../org/apache/spark/sql/types/StructType.html" title="class in org.apache.spark.sql.types">StructType</a> schema)</code>
<div class="block">:: DeveloperApi ::</div>
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<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#uid()">uid</a></strong>()</code>
<div class="block">An immutable unique ID for the object and its derivatives.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#validateParams()">validateParams</a></strong>()</code>
<div class="block">Validates parameter values stored internally.</div>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#validIndices(int[])">validIndices</a></strong>(int[] indices)</code>
<div class="block">Return true if given feature indices are valid</div>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html#validNames(java.lang.String[])">validNames</a></strong>(java.lang.String[] names)</code>
<div class="block">Return true if given feature names are valid</div>
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<code><a href="../../../../../org/apache/spark/ml/util/Identifiable.html#toString()">toString</a></code></li>
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<code><a href="../../../../../org/apache/spark/Logging.html#initializeIfNecessary()">initializeIfNecessary</a>, <a href="../../../../../org/apache/spark/Logging.html#initializeLogging()">initializeLogging</a>, <a href="../../../../../org/apache/spark/Logging.html#isTraceEnabled()">isTraceEnabled</a>, <a href="../../../../../org/apache/spark/Logging.html#log_()">log_</a>, <a href="../../../../../org/apache/spark/Logging.html#log()">log</a>, <a href="../../../../../org/apache/spark/Logging.html#logDebug(scala.Function0)">logDebug</a>, <a href="../../../../../org/apache/spark/Logging.html#logDebug(scala.Function0, java.lang.Throwable)">logDebug</a>, <a href="../../../../../org/apache/spark/Logging.html#logError(scala.Function0)">logError</a>, <a href="../../../../../org/apache/spark/Logging.html#logError(scala.Function0, java.lang.Throwable)">logError</a>, <a href="../../../../../org/apache/spark/Logging.html#logInfo(scala.Function0)">logInfo</a>, <a href="../../../../../org/apache/spark/Logging.html#logInfo(scala.Function0, java.lang.Throwable)">logInfo</a>, <a href="../../../../../org/apache/spark/Logging.html#logName()">logName</a>, <a href="../../../../../org/apache/spark/Logging.html#logTrace(scala.Function0)">logTrace</a>, <a href="../../../../../org/apache/spark/Logging.html#logTrace(scala.Function0, java.lang.Throwable)">logTrace</a>, <a href="../../../../../org/apache/spark/Logging.html#logWarning(scala.Function0)">logWarning</a>, <a href="../../../../../org/apache/spark/Logging.html#logWarning(scala.Function0, java.lang.Throwable)">logWarning</a></code></li>
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<pre>public VectorSlicer(java.lang.String uid)</pre>
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<pre>public VectorSlicer()</pre>
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<pre>public static boolean validIndices(int[] indices)</pre>
<div class="block">Return true if given feature indices are valid</div>
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<pre>public static boolean validNames(java.lang.String[] names)</pre>
<div class="block">Return true if given feature names are valid</div>
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<pre>public java.lang.String uid()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../org/apache/spark/ml/util/Identifiable.html#uid()">Identifiable</a></code></strong></div>
<div class="block">An immutable unique ID for the object and its derivatives.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public <a href="../../../../../org/apache/spark/ml/param/IntArrayParam.html" title="class in org.apache.spark.ml.param">IntArrayParam</a> indices()</pre>
<div class="block">An array of indices to select features from a vector column.
There can be no overlap with <code>names</code>.
Default: Empty array</div>
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<pre>public int[] getIndices()</pre>
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<pre>public <a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a> setIndices(int[] value)</pre>
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<pre>public <a href="../../../../../org/apache/spark/ml/param/StringArrayParam.html" title="class in org.apache.spark.ml.param">StringArrayParam</a> names()</pre>
<div class="block">An array of feature names to select features from a vector column.
These names must be specified by ML <a href="../../../../../org/apache/spark/ml/attribute/Attribute.html" title="class in org.apache.spark.ml.attribute"><code>Attribute</code></a>s.
There can be no overlap with <code>indices</code>.
Default: Empty Array</div>
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<pre>public <a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a> setNames(java.lang.String[] value)</pre>
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<pre>public <a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a> setInputCol(java.lang.String value)</pre>
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<pre>public <a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</a> setOutputCol(java.lang.String value)</pre>
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<h4>validateParams</h4>
<pre>public void validateParams()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../org/apache/spark/ml/param/Params.html#validateParams()">Params</a></code></strong></div>
<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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<h4>transform</h4>
<pre>public <a href="../../../../../org/apache/spark/sql/DataFrame.html" title="class in org.apache.spark.sql">DataFrame</a> transform(<a href="../../../../../org/apache/spark/sql/DataFrame.html" title="class in org.apache.spark.sql">DataFrame</a> dataset)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../../org/apache/spark/ml/Transformer.html#transform(org.apache.spark.sql.DataFrame)">Transformer</a></code></strong></div>
<div class="block">Transforms the input dataset.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/spark/ml/Transformer.html#transform(org.apache.spark.sql.DataFrame)">transform</a></code> in class <code><a href="../../../../../org/apache/spark/ml/Transformer.html" title="class in org.apache.spark.ml">Transformer</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>dataset</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<h4>transformSchema</h4>
<pre>public <a href="../../../../../org/apache/spark/sql/types/StructType.html" title="class in org.apache.spark.sql.types">StructType</a> transformSchema(<a href="../../../../../org/apache/spark/sql/types/StructType.html" title="class in org.apache.spark.sql.types">StructType</a> schema)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../../org/apache/spark/ml/PipelineStage.html#transformSchema(org.apache.spark.sql.types.StructType)">PipelineStage</a></code></strong></div>
<div class="block">:: DeveloperApi ::
<p>
Derives the output schema from the input schema.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/spark/ml/PipelineStage.html#transformSchema(org.apache.spark.sql.types.StructType)">transformSchema</a></code> in class <code><a href="../../../../../org/apache/spark/ml/PipelineStage.html" title="class in org.apache.spark.ml">PipelineStage</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>schema</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<h4>copy</h4>
<pre>public <a href="../../../../../org/apache/spark/ml/feature/VectorSlicer.html" title="class in org.apache.spark.ml.feature">VectorSlicer</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"><strong>Description copied from interface: <code><a href="../../../../../org/apache/spark/ml/param/Params.html#copy(org.apache.spark.ml.param.ParamMap)">Params</a></code></strong></div>
<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><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/spark/ml/param/Params.html#copy(org.apache.spark.ml.param.ParamMap)">copy</a></code> in interface <code><a href="../../../../../org/apache/spark/ml/param/Params.html" title="interface in org.apache.spark.ml.param">Params</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/spark/ml/Transformer.html#copy(org.apache.spark.ml.param.ParamMap)">copy</a></code> in class <code><a href="../../../../../org/apache/spark/ml/Transformer.html" title="class in org.apache.spark.ml">Transformer</a></code></dd>
<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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