dragon.matrix

Class AbstractMatrix

java.lang.Object

dragon.matrix.AbstractMatrix

All Implemented Interfaces:

Matrix, Serializable

Direct Known Subclasses:

AbstractDenseMatrix, AbstractSparseMatrix

public abstract class AbstractMatrix
extends Object
implements Matrix, Serializable

Abstract Matrix implements basic functions such as getting base row, getting base column and so on.

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	cellDataLength
protected int	columnBase
protected int	columns
protected int	rowBase
protected int	rows
protected Matrix	transposeMatrix

Constructor Summary

Constructors

Constructor and Description
AbstractMatrix()

Method Summary

Modifier and Type	Method and Description
int	columns()
int	getBaseColumn() The index of the first column in a matrix is zero.
int	getBaseRow() The index of the first row in a matrix is zero.
int	getCellDataLength() For double matrix, this method returns 8; for integer matrix, it returns 4.
Matrix	getTranspose() If one never calls niether the method of setTranspose nor the method of transpose, it returns null.
int	rows()
void	setTranspose(Matrix matrix) Manually set the transposed matrix.
Matrix	transpose() if one has set the transposed matrix by calling the method setTranspose, this method simply return that transposed matrix.

Methods inherited from class java.lang.Object

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

Methods inherited from interface dragon.matrix.Matrix

close, cosine, getCooccurrenceCount, getDouble, getInt

Field Detail

transposeMatrix

protected Matrix transposeMatrix

rows

protected int rows

columns

protected int columns

rowBase

protected int rowBase

columnBase

protected int columnBase

cellDataLength

protected int cellDataLength

Constructor Detail

AbstractMatrix

public AbstractMatrix()

Method Detail

rows

public int rows()

Specified by:

rows in interface Matrix

Returns:

number of rows

columns

public int columns()

Specified by:

columns in interface Matrix

Returns:

number of columns

setTranspose

public void setTranspose(Matrix matrix)

Description copied from interface: Matrix

Manually set the transposed matrix.

Specified by:

setTranspose in interface Matrix

Parameters:

matrix - the transpose matrix of the current matrix.

getTranspose

public Matrix getTranspose()

Description copied from interface: Matrix

If one never calls niether the method of setTranspose nor the method of transpose, it returns null.

Specified by:

getTranspose in interface Matrix

Returns:

the transpose matrix

transpose

public Matrix transpose()

Description copied from interface: Matrix

if one has set the transposed matrix by calling the method setTranspose, this method simply return that transposed matrix. Otherwise, it will generate the transposed matrix online. So this method may take several minutes.

Specified by:

transpose in interface Matrix

Returns:

the transposed matrix

getCellDataLength

public int getCellDataLength()

Description copied from interface: Matrix

For double matrix, this method returns 8; for integer matrix, it returns 4.

Specified by:

getCellDataLength in interface Matrix

Returns:

the length in bytes of the data stored in the cell.

getBaseRow

public int getBaseRow()

Description copied from interface: Matrix

The index of the first row in a matrix is zero. The base row is the index of the first non-empty row of the matrix.

Specified by:

getBaseRow in interface Matrix

Returns:

the index of the first non-empty row of the matrix.

getBaseColumn

public int getBaseColumn()

Description copied from interface: Matrix

The index of the first column in a matrix is zero. The base column is the index of the first non-empty column of the matrix. This method is not used in this version. It always simply returns zero.

Specified by:

getBaseColumn in interface Matrix

Returns:

zero.