org.apache.giraph.aggregators.matrix.sparse

Class FloatSparseMatrix

java.lang.Object

org.apache.giraph.aggregators.matrix.sparse.FloatSparseMatrix

public class FloatSparseMatrix
extends Object

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

Constructor Summary

Constructors

Constructor and Description
FloatSparseMatrix(int numRows) Create a new matrix with the given number of rows.

Method Summary

Modifier and Type	Method and Description
float	get(int i, int j) Get a specific entry of the matrix.
int	getNumRows() Get the number of rows in the matrix.
FloatSparseVector	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, float v) Set a specific entry of the matrix.
void	setRow(int i, FloatSparseVector vec) Set the float vector as the row specified.

Methods inherited from class java.lang.Object

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

Constructor Detail

FloatSparseMatrix

public FloatSparseMatrix(int numRows)

Create a new matrix with the given number of rows.

Parameters:

numRows - the number of rows.

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.

get

public float 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,
                float v)

Set a specific entry of the matrix.

Parameters:

i - the row

j - the column

v - the value of the entry

getRow

public FloatSparseVector getRow(int i)

Get a specific row of the matrix.

Parameters:

i - the row number

Returns:

the row of the matrix

setRow

public void setRow(int i,
                   FloatSparseVector vec)

Set the float vector as the row specified.

Parameters:

i - the row

vec - the vector to set as the row