org.jmat.data.matrixTools
Class Sorting

java.lang.Object
  |
  +--org.jmat.data.matrixTools.Sorting

public class Sorting

extends java.lang.Object

Quick Sort algoritm.

Allows to sort a column quickly, Using a generic version of C.A.R Hoare's Quick Sort algorithm.

Constructor Summary

Sorting(double[] array, boolean copyArray)
Construct an ascending order.

Method Summary

int[]	getIndex() Get the ascending order of all lines.
int	getIndex(int i) Get the ascending order of one line.
Matrix	getIndexMatrix() Get the ascending order of all lines.
static void	main(java.lang.String[] args)
static Matrix	MatrixColumns(Matrix X, int i) Sort columns of a Matrix
static Matrix	MatrixColumnsIndex(Matrix X, int i) Sort columns of a Matrix
static Matrix	MatrixRows(Matrix X, int j) Sort rows of a Matrix
static Matrix	MatrixRowsIndex(Matrix X, int j) Sort rows of a Matrix

Methods inherited from class java.lang.Object

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

Constructor Detail

Sorting

public Sorting(double[] array,
               boolean copyArray)

Construct an ascending order.

Parameters:

array - Array to sort.

copyArray - Specify if the sort is made directly : true -> array is modified (usefull for big arrays !), false -> array is copied and not modified (more memory used).

Method Detail

MatrixRowsIndex

public static Matrix MatrixRowsIndex(Matrix X,
                                     int j)

Sort rows of a Matrix

Parameters:

X - Matrix to sort

j - index of the column to sort

Returns:

a Matrix

MatrixColumnsIndex

public static Matrix MatrixColumnsIndex(Matrix X,
                                        int i)

Sort columns of a Matrix

Parameters:

X - Matrix to sort

i - index of the row to sort

Returns:

a Matrix

MatrixRows

public static Matrix MatrixRows(Matrix X,
                                int j)

Sort rows of a Matrix

Parameters:

X - Matrix to sort

j - index of the column to sort

Returns:

a Matrix

MatrixColumns

public static Matrix MatrixColumns(Matrix X,
                                   int i)

Sort columns of a Matrix

Parameters:

X - Matrix to sort

i - index of the row to sort

Returns:

a Matrix

getIndex

public int getIndex(int i)

Get the ascending order of one line.

Parameters:

i - Line number.

Returns:

Ascending order of the line.

getIndex

public int[] getIndex()

Get the ascending order of all lines.

Returns:

Ascending order of lines.

getIndexMatrix

public Matrix getIndexMatrix()

Get the ascending order of all lines.

Returns:

Ascending order of lines.

main

public static void main(java.lang.String[] args)