Package org.ejml.data

Class DMatrixIterator

java.lang.Object

org.ejml.data.DMatrixIterator

All Implemented Interfaces:

Iterator<Double>

public class DMatrixIterator
extends Object
implements Iterator<Double>

This is a matrix iterator for traversing through a submatrix. For speed it is recommended that you directly access the elements in the matrix, but there are some situations where this can be a better design.

Constructor Summary

Constructors

Constructor	Description
DMatrixIterator(DMatrixD1 a, boolean rowMajor, int minRow, int minCol, int maxRow, int maxCol)	Creates a new iterator for traversing through a submatrix inside this matrix.

Method Summary

Modifier and Type	Method	Description
int	getIndex()	Which element in the submatrix was returned by next()
boolean	hasNext()
boolean	isRowMajor()	True if it is iterating through the matrix by rows and false if by columns.
Double	next()
void	remove()
void	set(double value)	Sets the value of the current element.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

DMatrixIterator

public DMatrixIterator(DMatrixD1 a,
 boolean rowMajor,
 int minRow,
 int minCol,
 int maxRow,
 int maxCol)

Creates a new iterator for traversing through a submatrix inside this matrix. It can be traversed by row or by column. Range of elements is inclusive, e.g. minRow = 0 and maxRow = 1 will include rows 0 and 1. The iteration starts at (minRow,minCol) and ends at (maxRow,maxCol)

Parameters:

a - the matrix it is iterating through

rowMajor - true means it will traverse through the submatrix by row first, false by columns.

minRow - first row it will start at.

minCol - first column it will start at.

maxRow - last row it will stop at.

maxCol - last column it will stop at.

Method Details

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Double>

next

public Double next()

Specified by:

next in interface Iterator<Double>

remove

public void remove()

Specified by:

remove in interface Iterator<Double>

getIndex

public int getIndex()

Which element in the submatrix was returned by next()

Returns:

Submatrix element's index.

isRowMajor

public boolean isRowMajor()

True if it is iterating through the matrix by rows and false if by columns.

Returns:

row major or column major

set

public void set(double value)

Sets the value of the current element.

Parameters:

value - The element's new value.