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| <h2 title="Class FeatureVectorEncoder" class="title">Class FeatureVectorEncoder</h2> |
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| <dd><a href="../../../../../org/apache/mahout/vectorizer/encoders/CachingValueEncoder.html" title="class in org.apache.mahout.vectorizer.encoders">CachingValueEncoder</a>, <a href="../../../../../org/apache/mahout/vectorizer/encoders/InteractionValueEncoder.html" title="class in org.apache.mahout.vectorizer.encoders">InteractionValueEncoder</a>, <a href="../../../../../org/apache/mahout/vectorizer/encoders/TextValueEncoder.html" title="class in org.apache.mahout.vectorizer.encoders">TextValueEncoder</a>, <a href="../../../../../org/apache/mahout/vectorizer/encoders/WordValueEncoder.html" title="class in org.apache.mahout.vectorizer.encoders">WordValueEncoder</a></dd> |
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| <pre>public abstract class <span class="typeNameLabel">FeatureVectorEncoder</span> |
| extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">General interface for objects that record features into a feature vector. |
| <p/> |
| By convention, sub-classes should provide a constructor that accepts just a field name as well as |
| setters to customize properties of the conversion such as adding tokenizers or a weight |
| dictionary.</div> |
| </li> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#CONTINUOUS_VALUE_HASH_SEED">CONTINUOUS_VALUE_HASH_SEED</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#WORD_LIKE_VALUE_HASH_SEED">WORD_LIKE_VALUE_HASH_SEED</a></span></code> </td> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
| <th class="colLast" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#FeatureVectorEncoder-java.lang.String-">FeatureVectorEncoder</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#FeatureVectorEncoder-java.lang.String-int-">FeatureVectorEncoder</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| int probes)</code> </td> |
| </tr> |
| </table> |
| </li> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>abstract void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#addToVector-byte:A-double-org.apache.mahout.math.Vector-">addToVector</a></span>(byte[] originalForm, |
| double weight, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#addToVector-byte:A-org.apache.mahout.math.Vector-">addToVector</a></span>(byte[] originalForm, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</code> |
| <div class="block">Adds a value expressed in byte array form to a vector.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#addToVector-java.lang.String-double-org.apache.mahout.math.Vector-">addToVector</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> originalForm, |
| double weight, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</code> |
| <div class="block">Adds a weighted value expressed in string form to a vector.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#addToVector-java.lang.String-org.apache.mahout.math.Vector-">addToVector</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> originalForm, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</code> |
| <div class="block">Adds a value expressed in string form to a vector.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>abstract <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#asString-java.lang.String-">asString</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> originalForm)</code> |
| <div class="block">Converts a value into a form that would help a human understand the internals of how the value |
| is being interpreted.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected static byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#bytesForString-java.lang.String-">bytesForString</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> x)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#getName--">getName</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#getProbes--">getProbes</a></span>()</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>protected double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#getWeight-byte:A-double-">getWeight</a></span>(byte[] originalForm, |
| double w)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hash-byte:A-byte:A-int-int-">hash</a></span>(byte[] term1, |
| byte[] term2, |
| int probe, |
| int numFeatures)</code> |
| <div class="block">Hash two byte arrays and an integer into the range [0..numFeatures-1].</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>protected static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hash-byte:A-int-int-">hash</a></span>(byte[] term, |
| int probe, |
| int numFeatures)</code> |
| <div class="block">Hash a byte array and an integer into the range [0..numFeatures-1].</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hash-java.lang.String-int-int-">hash</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term, |
| int probe, |
| int numFeatures)</code> |
| <div class="block">Hash a string and an integer into the range [0..numFeatures-1].</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>protected static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hash-java.lang.String-java.lang.String-int-int-">hash</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term1, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term2, |
| int probe, |
| int numFeatures)</code> |
| <div class="block">Hash two strings and an integer into the range [0..numFeatures-1].</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hash-java.lang.String-java.lang.String-java.lang.String-java.lang.String-int-int-">hash</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term1, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term2, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term3, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term4, |
| int probe, |
| int numFeatures)</code> |
| <div class="block">Hash four strings and an integer into the range [0..numFeatures-1].</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>protected <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hashesForProbe-byte:A-int-java.lang.String-int-">hashesForProbe</a></span>(byte[] originalForm, |
| int dataSize, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| int probe)</code> |
| <div class="block">Returns all of the hashes for this probe.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>protected abstract int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#hashForProbe-byte:A-int-java.lang.String-int-">hashForProbe</a></span>(byte[] originalForm, |
| int dataSize, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| int probe)</code> |
| <div class="block">Provides the unique hash for a particular probe.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#isTraceEnabled--">isTraceEnabled</a></span>()</code> </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#setProbes-int-">setProbes</a></span>(int probes)</code> |
| <div class="block">Sets the number of locations in the feature vector that a value should be in.</div> |
| </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#setTraceDictionary-java.util.Map-">setTraceDictionary</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>>> traceDictionary)</code> </td> |
| </tr> |
| <tr id="i19" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#trace-byte:A-int-">trace</a></span>(byte[] subName, |
| int n)</code> </td> |
| </tr> |
| <tr id="i20" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/vectorizer/encoders/FeatureVectorEncoder.html#trace-java.lang.String-int-">trace</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> subName, |
| int n)</code> </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
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| </ul> |
| </div> |
| <div class="details"> |
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| <!-- ============ FIELD DETAIL =========== --> |
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| <h4>CONTINUOUS_VALUE_HASH_SEED</h4> |
| <pre>protected static final int CONTINUOUS_VALUE_HASH_SEED</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder.CONTINUOUS_VALUE_HASH_SEED">Constant Field Values</a></dd> |
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| <pre>protected static final int WORD_LIKE_VALUE_HASH_SEED</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder.WORD_LIKE_VALUE_HASH_SEED">Constant Field Values</a></dd> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <h3>Constructor Detail</h3> |
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| <h4>FeatureVectorEncoder</h4> |
| <pre>protected FeatureVectorEncoder(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| </li> |
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| <pre>protected FeatureVectorEncoder(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| int probes)</pre> |
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| <h4>addToVector</h4> |
| <pre>public void addToVector(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> originalForm, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</pre> |
| <div class="block">Adds a value expressed in string form to a vector.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>originalForm</code> - The original form of the value as a string.</dd> |
| <dd><code>data</code> - The vector to which the value should be added.</dd> |
| </dl> |
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| <pre>public void addToVector(byte[] originalForm, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</pre> |
| <div class="block">Adds a value expressed in byte array form to a vector.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>originalForm</code> - The original form of the value as a byte array.</dd> |
| <dd><code>data</code> - The vector to which the value should be added.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>addToVector</h4> |
| <pre>public void addToVector(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> originalForm, |
| double weight, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</pre> |
| <div class="block">Adds a weighted value expressed in string form to a vector. In some cases it is convenient to |
| use this method to encode continuous values using the weight as the value. In such cases, the |
| string value should typically be set to null.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>originalForm</code> - The original form of the value as a string.</dd> |
| <dd><code>weight</code> - The weight to be applied to this feature.</dd> |
| <dd><code>data</code> - The vector to which the value should be added.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>addToVector</h4> |
| <pre>public abstract void addToVector(byte[] originalForm, |
| double weight, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> data)</pre> |
| </li> |
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| <h4>hashForProbe</h4> |
| <pre>protected abstract int hashForProbe(byte[] originalForm, |
| int dataSize, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| int probe)</pre> |
| <div class="block">Provides the unique hash for a particular probe. For all encoders except text, this |
| is all that is needed and the default implementation of hashesForProbe will do the right |
| thing. For text and similar values, hashesForProbe should be over-ridden and this method |
| should not be used.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>originalForm</code> - The original byte array value</dd> |
| <dd><code>dataSize</code> - The length of the vector being encoded</dd> |
| <dd><code>name</code> - The name of the variable being encoded</dd> |
| <dd><code>probe</code> - The probe number</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The hash of the current probe</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>hashesForProbe</h4> |
| <pre>protected <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>> hashesForProbe(byte[] originalForm, |
| int dataSize, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| int probe)</pre> |
| <div class="block">Returns all of the hashes for this probe. For most encoders, this is a singleton, but |
| for text, many hashes are returned, one for each word (unique or not). Most implementations |
| should only implement hashForProbe for simplicity.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>originalForm</code> - The original byte array value.</dd> |
| <dd><code>dataSize</code> - The length of the vector being encoded</dd> |
| <dd><code>name</code> - The name of the variable being encoded</dd> |
| <dd><code>probe</code> - The probe number</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an Iterable of the hashes</dd> |
| </dl> |
| </li> |
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| <h4>getWeight</h4> |
| <pre>protected double getWeight(byte[] originalForm, |
| double w)</pre> |
| </li> |
| </ul> |
| <a name="hash-java.lang.String-int-int-"> |
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| </a> |
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| <h4>hash</h4> |
| <pre>protected int hash(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term, |
| int probe, |
| int numFeatures)</pre> |
| <div class="block">Hash a string and an integer into the range [0..numFeatures-1].</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>term</code> - The string.</dd> |
| <dd><code>probe</code> - An integer that modifies the resulting hash.</dd> |
| <dd><code>numFeatures</code> - The range into which the resulting hash must fit.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An integer in the range [0..numFeatures-1] that has good spread for small changes in |
| term and probe.</dd> |
| </dl> |
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| <h4>hash</h4> |
| <pre>protected static int hash(byte[] term, |
| int probe, |
| int numFeatures)</pre> |
| <div class="block">Hash a byte array and an integer into the range [0..numFeatures-1].</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>term</code> - The bytes.</dd> |
| <dd><code>probe</code> - An integer that modifies the resulting hash.</dd> |
| <dd><code>numFeatures</code> - The range into which the resulting hash must fit.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An integer in the range [0..numFeatures-1] that has good spread for small changes in |
| term and probe.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <pre>protected static int hash(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term1, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term2, |
| int probe, |
| int numFeatures)</pre> |
| <div class="block">Hash two strings and an integer into the range [0..numFeatures-1].</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>term1</code> - The first string.</dd> |
| <dd><code>term2</code> - The second string.</dd> |
| <dd><code>probe</code> - An integer that modifies the resulting hash.</dd> |
| <dd><code>numFeatures</code> - The range into which the resulting hash must fit.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An integer in the range [0..numFeatures-1] that has good spread for small changes in |
| term and probe.</dd> |
| </dl> |
| </li> |
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| <h4>hash</h4> |
| <pre>protected int hash(byte[] term1, |
| byte[] term2, |
| int probe, |
| int numFeatures)</pre> |
| <div class="block">Hash two byte arrays and an integer into the range [0..numFeatures-1].</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>term1</code> - The first string.</dd> |
| <dd><code>term2</code> - The second string.</dd> |
| <dd><code>probe</code> - An integer that modifies the resulting hash.</dd> |
| <dd><code>numFeatures</code> - The range into which the resulting hash must fit.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An integer in the range [0..numFeatures-1] that has good spread for small changes in |
| term and probe.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <pre>protected int hash(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term1, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term2, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term3, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> term4, |
| int probe, |
| int numFeatures)</pre> |
| <div class="block">Hash four strings and an integer into the range [0..numFeatures-1].</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>term1</code> - The first string.</dd> |
| <dd><code>term2</code> - The second string.</dd> |
| <dd><code>term3</code> - The third string</dd> |
| <dd><code>term4</code> - And the fourth.</dd> |
| <dd><code>probe</code> - An integer that modifies the resulting hash.</dd> |
| <dd><code>numFeatures</code> - The range into which the resulting hash must fit.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An integer in the range [0..numFeatures-1] that has good spread for small changes in |
| term and probe.</dd> |
| </dl> |
| </li> |
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| <h4>asString</h4> |
| <pre>public abstract <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> asString(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> originalForm)</pre> |
| <div class="block">Converts a value into a form that would help a human understand the internals of how the value |
| is being interpreted. For text-like things, this is likely to be a list of the terms found |
| with associated weights (if any).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>originalForm</code> - The original form of the value as a string.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A string that a human can read.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getProbes</h4> |
| <pre>public int getProbes()</pre> |
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| <pre>public void setProbes(int probes)</pre> |
| <div class="block">Sets the number of locations in the feature vector that a value should be in.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>probes</code> - Number of locations to increment.</dd> |
| </dl> |
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| int n)</pre> |
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| <pre>protected static byte[] bytesForString(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> x)</pre> |
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