org.apache.giraph.aggregators.matrix.dense

Class IntDenseMatrix

java.lang.Object

org.apache.giraph.aggregators.matrix.dense.IntDenseMatrix

public class IntDenseMatrix
extends Object

A int matrix holds the values of the entries in int vectors. It keeps one int aggregator per matrix row.

Constructor Summary

Constructors

Constructor and Description
IntDenseMatrix(int size) Create a new matrix with the same number of rows and columns.
IntDenseMatrix(int numRows, int numColumns) Create a new matrix with the given number of rows and columns.

Method Summary

Modifier and Type	Method and Description
void	addRow(IntDenseVector vec) Add the int vector as a row in the matrix.
int	get(int i, int j) Get a specific entry of the matrix.
int	getNumColumns() Get the number of the columns in the matrix.
int	getNumRows() Get the number of rows in the matrix.
IntDenseVector	getRow(int i) Get a specific row of the matrix.
void	initialize() Create a empty matrix with all values set to 0.0
void	set(int i, int j, int v) Set a specific entry of the matrix.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IntDenseMatrix

public IntDenseMatrix(int size)

Create a new matrix with the same number of rows and columns.

Parameters:

size - the number of rows and columns

IntDenseMatrix

public IntDenseMatrix(int numRows,
                      int numColumns)

Create a new matrix with the given number of rows and columns.

Parameters:

numRows - the number of rows

numColumns - the number of columns

Method Detail

initialize

public void initialize()

Create a empty matrix with all values set to 0.0

getNumRows

public int getNumRows()

Get the number of rows in the matrix.

Returns:

the number of rows

getNumColumns

public int getNumColumns()

Get the number of the columns in the matrix.

Returns:

the number of rows

get

public int get(int i,
               int j)

Get a specific entry of the matrix.

Parameters:

i - the row

j - the column

Returns:

the value of the entry

set

public void set(int i,
                int j,
                int v)

Set a specific entry of the matrix.

Parameters:

i - the row

j - the column

v - the value of the entry

getRow

public IntDenseVector getRow(int i)

Get a specific row of the matrix.

Parameters:

i - the row number

Returns:

the row of the matrix

addRow

public void addRow(IntDenseVector vec)

Add the int vector as a row in the matrix.

Parameters:

vec - the vector to add