dragon.matrix
Class AbstractDenseMatrix

java.lang.Object
  |
  +--dragon.matrix.AbstractMatrix
        |
        +--dragon.matrix.AbstractDenseMatrix

All Implemented Interfaces:

DenseMatrix, Matrix, java.io.Serializable

Direct Known Subclasses:

DoubleFlatDenseMatrix, IntFlatDenseMatrix

public abstract class AbstractDenseMatrix

extends AbstractMatrix

implements DenseMatrix, java.io.Serializable

Implements basic functions of interface--DenseMatrix and extends class AbstractMatrix

Description:

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

See Also:

Serialized Form

Field Summary

Fields inherited from class dragon.matrix.AbstractMatrix

cellDataLength, columnBase, columns, rowBase, rows, transposeMatrix

Constructor Summary

AbstractDenseMatrix(int row, int column, int cellDataLength)

Method Summary

double	cosine(int rowA, int rowB) This method treats each row a vector and return the cosine similarity of two rows.
int	getCooccurrenceCount(int rowA, int rowB) If two cells in the same column have non-zero scores, they will be counted as co-occurred.

Methods inherited from class dragon.matrix.AbstractMatrix

columns, getBaseColumn, getBaseRow, getCellDataLength, getTranspose, rows, setTranspose, transpose

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, columns, getBaseColumn, getBaseRow, getCellDataLength, getDouble, getInt, getTranspose, rows, setTranspose, transpose

Constructor Detail

AbstractDenseMatrix

public AbstractDenseMatrix(int row,
                           int column,
                           int cellDataLength)

Method Detail

cosine

public double cosine(int rowA,
                     int rowB)

Description copied from interface: Matrix

This method treats each row a vector and return the cosine similarity of two rows.

Specified by:

cosine in interface Matrix

Parameters:

rowA - the row index of the first vector

rowB - the row index of the second vector

Returns:

the cosine similarity of two given rows.

getCooccurrenceCount

public int getCooccurrenceCount(int rowA,
                                int rowB)

Description copied from interface: Matrix

If two cells in the same column have non-zero scores, they will be counted as co-occurred.

Specified by:

getCooccurrenceCount in interface Matrix

Parameters:

rowA - the index of the first row

rowB - the index of the second row

Returns:

the cooccurrence count