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<h2 title="Class HashingTF" class="title">Class HashingTF</h2>
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<pre>public class <span class="strong">HashingTF</span>
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<div class="block">:: Experimental ::
 Maps a sequence of terms to their term frequencies using the hashing trick.</div>
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<td class="colOne"><code><strong><a href="../../../../../org/apache/spark/ml/feature/HashingTF.html#HashingTF()">HashingTF</a></strong>()</code>&nbsp;</td>
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<td class="colOne"><code><strong><a href="../../../../../org/apache/spark/ml/feature/HashingTF.html#HashingTF(java.lang.String)">HashingTF</a></strong>(java.lang.String&nbsp;uid)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../../../org/apache/spark/ml/feature/HashingTF.html" title="class in org.apache.spark.ml.feature">HashingTF</a></code></td>
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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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<h4>HashingTF</h4>
<pre>public&nbsp;HashingTF(java.lang.String&nbsp;uid)</pre>
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<pre>public&nbsp;HashingTF()</pre>
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<pre>public&nbsp;java.lang.String&nbsp;uid()</pre>
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<div class="block">An immutable unique ID for the object and its derivatives.</div>
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<pre>public&nbsp;<a href="../../../../../org/apache/spark/ml/feature/HashingTF.html" title="class in org.apache.spark.ml.feature">HashingTF</a>&nbsp;setInputCol(java.lang.String&nbsp;value)</pre>
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<pre>public&nbsp;<a href="../../../../../org/apache/spark/ml/feature/HashingTF.html" title="class in org.apache.spark.ml.feature">HashingTF</a>&nbsp;setOutputCol(java.lang.String&nbsp;value)</pre>
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<pre>public&nbsp;<a href="../../../../../org/apache/spark/ml/param/IntParam.html" title="class in org.apache.spark.ml.param">IntParam</a>&nbsp;numFeatures()</pre>
<div class="block">Number of features.  Should be > 0.
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<pre>public&nbsp;int&nbsp;getNumFeatures()</pre>
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<pre>public&nbsp;<a href="../../../../../org/apache/spark/ml/feature/HashingTF.html" title="class in org.apache.spark.ml.feature">HashingTF</a>&nbsp;setNumFeatures(int&nbsp;value)</pre>
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<pre>public&nbsp;<a href="../../../../../org/apache/spark/sql/DataFrame.html" title="class in org.apache.spark.sql">DataFrame</a>&nbsp;transform(<a href="../../../../../org/apache/spark/sql/DataFrame.html" title="class in org.apache.spark.sql">DataFrame</a>&nbsp;dataset)</pre>
<div class="block"><strong>Description copied from class:&nbsp;<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>
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<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>&nbsp;in class&nbsp;<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>
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<div class="block"><strong>Description copied from class:&nbsp;<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 ::
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<dt><strong>Specified by:</strong></dt>
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<dt><span class="strong">Parameters:</span></dt><dd><code>schema</code> - (undocumented)</dd>
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<div class="block"><strong>Description copied from interface:&nbsp;<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.
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<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>&nbsp;in interface&nbsp;<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>
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<dt><span class="strong">Parameters:</span></dt><dd><code>extra</code> - (undocumented)</dd>
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