org.apache.giraph.aggregators.matrix.sparse

Class DoubleSparseVector

java.lang.Object

org.apache.giraph.aggregators.matrix.sparse.DoubleSparseVector

All Implemented Interfaces:

org.apache.hadoop.io.Writable

public class DoubleSparseVector
extends Object
implements org.apache.hadoop.io.Writable

The double vector holds the values of a particular row.

Constructor Summary

Constructors

Constructor and Description
DoubleSparseVector() Create a new vector with default size.
DoubleSparseVector(int size) Create a new vector with given size.

Method Summary

Modifier and Type	Method and Description
void	add(DoubleSparseVector other) Add the vector specified.
void	add(int key, double value) Increment value for a given key
void	clear() Clear the contents of the vector.
double	get(int i) Get a particular entry of the vector.
void	readFields(DataInput in)
void	set(int i, double value) Set the given value to the entry specified.
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleSparseVector

public DoubleSparseVector()

Create a new vector with default size.

DoubleSparseVector

public DoubleSparseVector(int size)

Create a new vector with given size.

Parameters:

size - the size of the vector

Method Detail

get

public double get(int i)

Get a particular entry of the vector.

Parameters:

i - the entry

Returns:

the value of the entry.

set

public void set(int i,
                double value)

Set the given value to the entry specified.

Parameters:

i - the entry

value - the value to set to the entry

add

public void add(int key,
                double value)

Increment value for a given key

Parameters:

key - Key

value - Increment

clear

public void clear()

Clear the contents of the vector.

add

public void add(DoubleSparseVector other)

Add the vector specified. This is a vector addition that does an element-by-element addition.

Parameters:

other - the vector to add.

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException