dragon.matrix

Interface Row

All Superinterfaces:

Comparable

All Known Implementing Classes:

AbstractRow, DoubleRow, IntRow

public interface Row
extends Comparable

Interface of row for sparse matrix

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Method Summary

Modifier and Type	Method and Description
Cell	getCell(int column) If the specified cell does not exist, it returns null.
float	getLoadFactor()
Cell	getNonZeroCell(int index)
int	getNonZeroColumn(int index)
int[]	getNonZeroColumns()
double	getNonZeroDoubleScore(int index) Return the double score of the index-th non-zero cell
int	getNonZeroIntScore(int index) Return the integer score of the index-th non-zero cell
int	getNonZeroNum()
int	getRowIndex()
void	load(int row, int num, byte[] data) This method will be called when the sparse matrix loads rows from a binary file.
void	setLoadFactor(float factor) Some implementations of sparse matrix cache rows in memory.

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

load

void load(int row,
          int num,
          byte[] data)

This method will be called when the sparse matrix loads rows from a binary file.

Parameters:

row - the index of the row

num - the number of non-zero cells in the row

data - the input data for the row

getRowIndex

int getRowIndex()

Returns:

the index of the row

getNonZeroNum

int getNonZeroNum()

Returns:

the number of non-zero cells in the current row

getNonZeroColumns

int[] getNonZeroColumns()

Returns:

an array of column indices of non-zero cells in the current row.

getNonZeroColumn

int getNonZeroColumn(int index)

Parameters:

index - the index-th non-zero cell in the currrent row

Returns:

the column index of the cell

getCell

Cell getCell(int column)

If the specified cell does not exist, it returns null.

Parameters:

column - the index of the column

Returns:

the cell object

getNonZeroCell

Cell getNonZeroCell(int index)

Parameters:

index - the index-th non-zero cell

Returns:

the cell object

getNonZeroDoubleScore

double getNonZeroDoubleScore(int index)

Return the double score of the index-th non-zero cell

Parameters:

index - the index-th non-zero cell

Returns:

double score

getNonZeroIntScore

int getNonZeroIntScore(int index)

Return the integer score of the index-th non-zero cell

Parameters:

index - the index-th non-zero cell

Returns:

integer score

setLoadFactor

void setLoadFactor(float factor)

Some implementations of sparse matrix cache rows in memory. In this case, it is required to have a measure to determine if the row should be removed from the cache when the cache is full.

Parameters:

factor - the measure of how this row is frequently used

getLoadFactor

float getLoadFactor()