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java.lang.Objectorg.apache.mahout.math.AbstractMatrix
org.apache.mahout.math.UpperTriangular
public class UpperTriangular
Quick and dirty implementation of some Matrix
methods
over packed upper triangular matrix.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.mahout.math.AbstractMatrix |
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AbstractMatrix.TransposeViewVector |
Field Summary |
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Fields inherited from class org.apache.mahout.math.AbstractMatrix |
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COL, columnLabelBindings, columns, ROW, rowLabelBindings, rows |
Constructor Summary | |
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UpperTriangular(double[] data,
boolean shallow)
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UpperTriangular(int n)
represents n x n upper triangular matrix |
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UpperTriangular(UpperTriangular mx)
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UpperTriangular(Vector data)
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Method Summary | |
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Matrix |
assignColumn(int column,
Vector other)
Assign the other vector values to the column of the receiver |
Matrix |
assignNonZeroElementsInRow(int row,
double[] other)
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Matrix |
assignRow(int row,
Vector other)
Assign the other vector values to the row of the receiver |
double[] |
getData()
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int[] |
getNumNondefaultElements()
Return the number of values in the recipient |
double |
getQuick(int row,
int column)
Return the value at the given indexes, without checking bounds |
Matrix |
like()
Return an empty matrix of the same underlying class as the receiver |
Matrix |
like(int rows,
int columns)
Returns an empty matrix of the same underlying class as the receiver and of the specified size. |
void |
setQuick(int row,
int column,
double value)
Set the value at the given index, without checking bounds |
Matrix |
viewPart(int[] offset,
int[] size)
Return a view into part of a matrix. |
Methods inherited from class org.apache.mahout.math.AbstractMatrix |
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aggregate, aggregateColumns, aggregateRows, asFormatString, assign, assign, assign, assign, assign, clone, columnSize, determinant, divide, get, get, getColumnLabelBindings, getRowLabelBindings, iterateAll, iterator, minus, numCols, numRows, numSlices, plus, plus, rowSize, set, set, set, set, set, set, setColumnLabelBindings, setRowLabelBindings, times, times, times, timesSquared, toString, transpose, viewColumn, viewDiagonal, viewPart, viewRow, zSum |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public UpperTriangular(int n)
n
- public UpperTriangular(double[] data, boolean shallow)
public UpperTriangular(Vector data)
public UpperTriangular(UpperTriangular mx)
Method Detail |
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public Matrix assignColumn(int column, Vector other)
Matrix
column
- the int row to assignother
- a Vector
public Matrix assignRow(int row, Vector other)
Matrix
row
- the int row to assignother
- a Vector
public Matrix assignNonZeroElementsInRow(int row, double[] other)
public double getQuick(int row, int column)
Matrix
row
- an int row indexcolumn
- an int column index
public Matrix like()
Matrix
public Matrix like(int rows, int columns)
Matrix
rows
- the int number of rowscolumns
- the int number of columnspublic void setQuick(int row, int column, double value)
Matrix
row
- an int row index into the receivercolumn
- an int column index into the receivervalue
- a double value to setpublic int[] getNumNondefaultElements()
Matrix
getNumNondefaultElements
in interface Matrix
getNumNondefaultElements
in class AbstractMatrix
public Matrix viewPart(int[] offset, int[] size)
Matrix
viewPart
in interface Matrix
viewPart
in class AbstractMatrix
offset
- an int[2] offset into the receiversize
- the int[2] size of the desired result
public double[] getData()
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