org.ejml.data

Class DenseD2Matrix64F

java.lang.Object

org.ejml.data.DenseD2Matrix64F

All Implemented Interfaces:

java.io.Serializable, Matrix, RealMatrix64F, ReshapeMatrix

public class DenseD2Matrix64F
extends java.lang.Object
implements java.io.Serializable, ReshapeMatrix, RealMatrix64F

A dense matrix where the array is stored as a 2D array.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
double[][]	data Where the raw data for the matrix is stored.
int	numCols Number of columns in the matrix.
int	numRows Number of rows in the matrix.

Constructor Summary

Constructors

Constructor and Description
DenseD2Matrix64F(int numRows, int numCols)

Method Summary

Modifier and Type	Method and Description
<T extends Matrix> T	copy() Creates an exact copy of the matrix
double	get(int row, int col) Returns the value of value of the specified matrix element.
int	getNumCols() Returns the number of columns in this matrix.
int	getNumElements() Returns the number of elements in this matrix, which is the number of rows times the number of columns.
int	getNumRows() Returns the number of rows in this matrix.
void	print() Prints the matrix to standard out.
void	reshape(int numRows, int numCols) Equivalent to invoking reshape(numRows,numCols,false);
void	set(int row, int col, double val) Sets the value of the specified matrix element.
void	set(Matrix original) Sets this matrix to be identical to the 'original' matrix passed in.
double	unsafe_get(int row, int col) Same as RealMatrix64F.get(int, int) but does not perform bounds check on input parameters.
void	unsafe_set(int row, int col, double val) Same as RealMatrix64F.set(int, int, double) but does not perform bounds check on input parameters.

Methods inherited from class java.lang.Object

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

Field Detail

data

public double[][] data

Where the raw data for the matrix is stored. The format is type dependent.

numRows

public int numRows

Number of rows in the matrix.

numCols

public int numCols

Number of columns in the matrix.

Constructor Detail

DenseD2Matrix64F

public DenseD2Matrix64F(int numRows,
                        int numCols)

Method Detail

reshape

public void reshape(int numRows,
                    int numCols)

Description copied from interface: ReshapeMatrix

Equivalent to invoking reshape(numRows,numCols,false);

Specified by:

reshape in interface ReshapeMatrix

Parameters:

numRows - The new number of rows in the matrix.

numCols - The new number of columns in the matrix.

get

public double get(int row,
                  int col)

Description copied from interface: RealMatrix64F

Returns the value of value of the specified matrix element.

Specified by:

get in interface RealMatrix64F

Parameters:

row - Matrix element's row index..

col - Matrix element's column index.

Returns:

The specified element's value.

set

public void set(int row,
                int col,
                double val)

Description copied from interface: RealMatrix64F

Sets the value of the specified matrix element.

Specified by:

set in interface RealMatrix64F

Parameters:

row - Matrix element's row index..

col - Matrix element's column index.

val - The element's new value.

unsafe_get

public double unsafe_get(int row,
                         int col)

Description copied from interface: RealMatrix64F

Same as RealMatrix64F.get(int, int) but does not perform bounds check on input parameters. This results in about a 25% speed increase but potentially sacrifices stability and makes it more difficult to track down simple errors. It is not recommended that this function be used, except in highly optimized code where the bounds are implicitly being checked.

Specified by:

unsafe_get in interface RealMatrix64F

Parameters:

row - Matrix element's row index..

col - Matrix element's column index.

Returns:

The specified element's value.

unsafe_set

public void unsafe_set(int row,
                       int col,
                       double val)

Description copied from interface: RealMatrix64F

Same as RealMatrix64F.set(int, int, double) but does not perform bounds check on input parameters. This results in about a 25% speed increase but potentially sacrifices stability and makes it more difficult to track down simple errors. It is not recommended that this function be used, except in highly optimized code where the bounds are implicitly being checked.

Specified by:

unsafe_set in interface RealMatrix64F

Parameters:

row - Matrix element's row index..

col - Matrix element's column index.

val - The element's new value.

getNumElements

public int getNumElements()

Description copied from interface: RealMatrix64F

Returns the number of elements in this matrix, which is the number of rows times the number of columns.

Specified by:

getNumElements in interface RealMatrix64F

Returns:

Number of elements in this matrix.

getNumRows

public int getNumRows()

Description copied from interface: Matrix

Returns the number of rows in this matrix.

Specified by:

getNumRows in interface Matrix

Returns:

Number of rows.

getNumCols

public int getNumCols()

Description copied from interface: Matrix

Returns the number of columns in this matrix.

Specified by:

getNumCols in interface Matrix

Returns:

Number of columns.

print

public void print()

Description copied from interface: Matrix

Prints the matrix to standard out.

Specified by:

print in interface Matrix

copy

public <T extends Matrix> T copy()

Description copied from interface: Matrix

Creates an exact copy of the matrix

Specified by:

copy in interface Matrix

set

public void set(Matrix original)

Description copied from interface: Matrix

Sets this matrix to be identical to the 'original' matrix passed in.

Specified by:

set in interface Matrix