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| <h2 title="Class FileBasedSparseBinaryMatrix" class="title">Class FileBasedSparseBinaryMatrix</h2> |
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| <pre>public final class <span class="typeNameLabel">FileBasedSparseBinaryMatrix</span> |
| extends <a href="../../../../org/apache/mahout/math/AbstractMatrix.html" title="class in org.apache.mahout.math">AbstractMatrix</a></pre> |
| <div class="block">Provides a way to get data from a file and treat it as if it were a matrix, but avoids putting |
| all that data onto the Java heap. Instead, the file is mapped into non-heap memory as a |
| DoubleBuffer and we access that instead. The interesting aspect of this is that the values in |
| the matrix are binary and sparse so we don't need to store the actual data, just the location of |
| non-zero values. |
| <p> |
| Currently file data is formatted as follows: |
| <p> |
| <ul> <li>A magic number to indicate the file format.</li> <li>The size of the matrix (max rows |
| and columns possible)</li> <li>Number of non-zeros in each row.</li> <li>A list of non-zero |
| columns for each row. The list starts with a count and then has column numbers</li> </ul> |
| <p> |
| It would be preferable to use something like protobufs to define the format so that we can use |
| different row formats for different kinds of data. For instance, Golay coding of column numbers |
| or compressed bit vectors might be good representations for some purposes.</div> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.BinaryReadOnlyElement.html" title="class in org.apache.mahout.math">FileBasedSparseBinaryMatrix.BinaryReadOnlyElement</a></span></code> </td> |
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| <h3>Nested classes/interfaces inherited from class org.apache.mahout.math.<a href="../../../../org/apache/mahout/math/AbstractMatrix.html" title="class in org.apache.mahout.math">AbstractMatrix</a></h3> |
| <code><a href="../../../../org/apache/mahout/math/AbstractMatrix.TransposeViewVector.html" title="class in org.apache.mahout.math">AbstractMatrix.TransposeViewVector</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#FileBasedSparseBinaryMatrix-int-int-">FileBasedSparseBinaryMatrix</a></span>(int rows, |
| int columns)</code> |
| <div class="block">Constructs an empty matrix of the given size.</div> |
| </td> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#assignColumn-int-org.apache.mahout.math.Vector-">assignColumn</a></span>(int column, |
| <a href="../../../../org/apache/mahout/math/Vector.html" title="interface in org.apache.mahout.math">Vector</a> other)</code> |
| <div class="block">Assign the other vector values to the column of the receiver</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#assignRow-int-org.apache.mahout.math.Vector-">assignRow</a></span>(int row, |
| <a href="../../../../org/apache/mahout/math/Vector.html" title="interface in org.apache.mahout.math">Vector</a> other)</code> |
| <div class="block">Assign the other vector values to the row of the receiver</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#getQuick-int-int-">getQuick</a></span>(int rowIndex, |
| int columnIndex)</code> |
| <div class="block">Return the value at the given indexes, without checking bounds</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#like--">like</a></span>()</code> |
| <div class="block">Return an empty matrix of the same underlying class as the receiver</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#like-int-int-">like</a></span>(int rows, |
| int columns)</code> |
| <div class="block">Returns an empty matrix of the same underlying class as the receiver and of the specified |
| size.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#setData-java.io.File-">setData</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> f)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#setQuick-int-int-double-">setQuick</a></span>(int row, |
| int column, |
| double value)</code> |
| <div class="block">Set the value at the given index, without checking bounds</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#viewPart-int:A-int:A-">viewPart</a></span>(int[] offset, |
| int[] size)</code> |
| <div class="block">Return a view into part of a matrix.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/mahout/math/Vector.html" title="interface in org.apache.mahout.math">Vector</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#viewRow-int-">viewRow</a></span>(int rowIndex)</code> |
| <div class="block">Returns a view of a row.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/math/FileBasedSparseBinaryMatrix.html#writeMatrix-java.io.File-org.apache.mahout.math.Matrix-">writeMatrix</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> f, |
| <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> m)</code> </td> |
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| <h3>Methods inherited from class org.apache.mahout.math.<a href="../../../../org/apache/mahout/math/AbstractMatrix.html" title="class in org.apache.mahout.math">AbstractMatrix</a></h3> |
| <code><a href="../../../../org/apache/mahout/math/AbstractMatrix.html#aggregate-org.apache.mahout.math.function.DoubleDoubleFunction-org.apache.mahout.math.function.DoubleFunction-">aggregate</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#aggregateColumns-org.apache.mahout.math.function.VectorFunction-">aggregateColumns</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#aggregateRows-org.apache.mahout.math.function.VectorFunction-">aggregateRows</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#asFormatString--">asFormatString</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#assign-double-">assign</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#assign-double:A:A-">assign</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#assign-org.apache.mahout.math.function.DoubleFunction-">assign</a>, <a 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href="../../../../org/apache/mahout/math/AbstractMatrix.html#plus-double-">plus</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#plus-org.apache.mahout.math.Matrix-">plus</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#rowSize--">rowSize</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#set-int-double:A-">set</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#set-int-int-double-">set</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#set-java.lang.String-double:A-">set</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#set-java.lang.String-int-double:A-">set</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#set-java.lang.String-java.lang.String-double-">set</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#set-java.lang.String-java.lang.String-int-int-double-">set</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#setColumnLabelBindings-java.util.Map-">setColumnLabelBindings</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#setRowLabelBindings-java.util.Map-">setRowLabelBindings</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#times-double-">times</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#times-org.apache.mahout.math.Matrix-">times</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#times-org.apache.mahout.math.Vector-">times</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#timesSquared-org.apache.mahout.math.Vector-">timesSquared</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#toString--">toString</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#transpose--">transpose</a>, <a href="../../../../org/apache/mahout/math/AbstractMatrix.html#viewColumn-int-">viewColumn</a>, <a 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| <h4>FileBasedSparseBinaryMatrix</h4> |
| <pre>public FileBasedSparseBinaryMatrix(int rows, |
| int columns)</pre> |
| <div class="block">Constructs an empty matrix of the given size.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rows</code> - The number of rows in the result.</dd> |
| <dd><code>columns</code> - The number of columns in the result.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <pre>public void setData(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> f) |
| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
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| <a name="writeMatrix-java.io.File-org.apache.mahout.math.Matrix-"> |
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| <h4>writeMatrix</h4> |
| <pre>public static void writeMatrix(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> f, |
| <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> m) |
| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
| </li> |
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| <a name="assignColumn-int-org.apache.mahout.math.Vector-"> |
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| </a> |
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| <h4>assignColumn</h4> |
| <pre>public <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> assignColumn(int column, |
| <a href="../../../../org/apache/mahout/math/Vector.html" title="interface in org.apache.mahout.math">Vector</a> other)</pre> |
| <div class="block">Assign the other vector values to the column of the receiver</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>column</code> - the int row to assign</dd> |
| <dd><code>other</code> - a Vector</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the modified receiver</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/CardinalityException.html" title="class in org.apache.mahout.math">CardinalityException</a></code> - if the cardinalities differ</dd> |
| </dl> |
| </li> |
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| <a name="assignRow-int-org.apache.mahout.math.Vector-"> |
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| </a> |
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| <h4>assignRow</h4> |
| <pre>public <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> assignRow(int row, |
| <a href="../../../../org/apache/mahout/math/Vector.html" title="interface in org.apache.mahout.math">Vector</a> other)</pre> |
| <div class="block">Assign the other vector values to the row of the receiver</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - the int row to assign</dd> |
| <dd><code>other</code> - a Vector</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the modified receiver</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/CardinalityException.html" title="class in org.apache.mahout.math">CardinalityException</a></code> - if the cardinalities differ</dd> |
| </dl> |
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| </ul> |
| <a name="getQuick-int-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getQuick</h4> |
| <pre>public double getQuick(int rowIndex, |
| int columnIndex)</pre> |
| <div class="block">Return the value at the given indexes, without checking bounds</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rowIndex</code> - an int row index</dd> |
| <dd><code>columnIndex</code> - an int column index</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the double at the index</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="like--"> |
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| </a> |
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| <li class="blockList"> |
| <h4>like</h4> |
| <pre>public <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> like()</pre> |
| <div class="block">Return an empty matrix of the same underlying class as the receiver</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a Matrix</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="like-int-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>like</h4> |
| <pre>public <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> like(int rows, |
| int columns)</pre> |
| <div class="block">Returns an empty matrix of the same underlying class as the receiver and of the specified |
| size.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rows</code> - the int number of rows</dd> |
| <dd><code>columns</code> - the int number of columns</dd> |
| </dl> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>setQuick</h4> |
| <pre>public void setQuick(int row, |
| int column, |
| double value)</pre> |
| <div class="block">Set the value at the given index, without checking bounds</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - an int row index into the receiver</dd> |
| <dd><code>column</code> - an int column index into the receiver</dd> |
| <dd><code>value</code> - a double value to set</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="viewPart-int:A-int:A-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>viewPart</h4> |
| <pre>public <a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a> viewPart(int[] offset, |
| int[] size)</pre> |
| <div class="block">Return a view into part of a matrix. Changes to the view will change the original matrix.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/Matrix.html#viewPart-int:A-int:A-">viewPart</a></code> in interface <code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/AbstractMatrix.html#viewPart-int:A-int:A-">viewPart</a></code> in class <code><a href="../../../../org/apache/mahout/math/AbstractMatrix.html" title="class in org.apache.mahout.math">AbstractMatrix</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>offset</code> - an int[2] offset into the receiver</dd> |
| <dd><code>size</code> - the int[2] size of the desired result</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a matrix that shares storage with part of the original matrix.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/CardinalityException.html" title="class in org.apache.mahout.math">CardinalityException</a></code> - if the length is greater than the cardinality of the receiver</dd> |
| <dd><code><a href="../../../../org/apache/mahout/math/IndexException.html" title="class in org.apache.mahout.math">IndexException</a></code> - if the offset is negative or the offset+length is outside of the receiver</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="viewRow-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>viewRow</h4> |
| <pre>public <a href="../../../../org/apache/mahout/math/Vector.html" title="interface in org.apache.mahout.math">Vector</a> viewRow(int rowIndex)</pre> |
| <div class="block">Returns a view of a row. Changes to the view will affect the original.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/Matrix.html#viewRow-int-">viewRow</a></code> in interface <code><a href="../../../../org/apache/mahout/math/Matrix.html" title="interface in org.apache.mahout.math">Matrix</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/mahout/math/AbstractMatrix.html#viewRow-int-">viewRow</a></code> in class <code><a href="../../../../org/apache/mahout/math/AbstractMatrix.html" title="class in org.apache.mahout.math">AbstractMatrix</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rowIndex</code> - Which row to return.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A vector that references the desired row.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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