regina::NMatrix< T > Class Template Reference
[Mathematical Support]

Represents a matrix of elements of the given type T. More...

#include <nmatrix.h>

Inheritance diagram for regina::NMatrix< T >:

List of all members.

Public Member Functions
	NMatrix (unsigned long rows, unsigned long cols)
	Creates a new matrix of the given size.
	NMatrix (const NMatrix &cloneMe)
	Creates a new matrix that is a clone of the given matrix.
virtual	~NMatrix ()
	Destroys this matrix.
void	initialise (const T &value)
	Sets every entry in the matrix to the given value.
unsigned long	rows () const
	Returns the number of rows in this matrix.
unsigned long	columns () const
	Returns the number of columns in this matrix.
T &	entry (unsigned long row, unsigned long column)
	Returns the entry at the given row and column.
const T &	entry (unsigned long row, unsigned long column) const
	Returns the entry at the given row and column.
virtual void	writeMatrix (std::ostream &out) const
	Writes a complete representation of the matrix to the given output stream.
void	swapRows (unsigned long first, unsigned long second)
	Swaps the elements of the two given rows in the matrix.
void	swapColumns (unsigned long first, unsigned long second)
	Swaps the elements of the two given columns in the matrix.
Protected Attributes
unsigned long	nRows
	The number of rows in the matrix.
unsigned long	nCols
	The number of columns in the matrix.
T **	data
	The actual entries in the matrix.

---

Detailed Description

template<class T>
class regina::NMatrix< T >

Represents a matrix of elements of the given type T.

Precondition:

Type T has a default constructor and overloads the assignment (=) operator.

An element t of type T can be written to an output stream out using the standard expression out << t.

Python:

Not present, although the subclass NMatrixInt is.

---

Constructor & Destructor Documentation

template<class T>

regina::NMatrix< T >::NMatrix	(	unsigned long	rows,
		unsigned long	cols
	)			[inline]

Creates a new matrix of the given size.

All entries will be initialised using their default constructors.

Precondition:

The given number of rows and columns are both strictly positive.

Parameters:

	rows	the number of rows in the new matrix.
	cols	the number of columns in the new matrix.

template<class T>

regina::NMatrix< T >::NMatrix

(

const NMatrix< T > &

cloneMe

)

[inline]

Creates a new matrix that is a clone of the given matrix.

Parameters:

cloneMe

the matrix to clone.

template<class T>

virtual regina::NMatrix< T >::~NMatrix

(

)

[inline, virtual]

Destroys this matrix.

---

Member Function Documentation

template<class T>

unsigned long regina::NMatrix< T >::columns

(

)

const [inline]

Returns the number of columns in this matrix.

Returns:

the number of columns.

template<class T>

const T& regina::NMatrix< T >::entry	(	unsigned long	row,
		unsigned long	column
	)			const [inline]

Returns the entry at the given row and column.

Rows and columns are numbered beginning at zero.

Precondition:

row is between 0 and rows()-1 inclusive.

column is between 0 and columns()-1 inclusive.

Python:

Not present, although the non-const form of this routine is.

Parameters:

	row	the row of the desired entry.
	column	the column of the desired entry.

Returns:

a reference to the entry in the given row and column.

template<class T>

T& regina::NMatrix< T >::entry	(	unsigned long	row,
		unsigned long	column
	)			[inline]

Returns the entry at the given row and column.

Rows and columns are numbered beginning at zero.

Precondition:

row is between 0 and rows()-1 inclusive.

column is between 0 and columns()-1 inclusive.

Parameters:

	row	the row of the desired entry.
	column	the column of the desired entry.

Returns:

a reference to the entry in the given row and column.

template<class T>

void regina::NMatrix< T >::initialise

(

const T &

value

)

[inline]

Sets every entry in the matrix to the given value.

Parameters:

value

the value to assign to each entry.

template<class T>

unsigned long regina::NMatrix< T >::rows

(

)

const [inline]

Returns the number of rows in this matrix.

Returns:

the number of rows.

template<class T>

void regina::NMatrix< T >::swapColumns	(	unsigned long	first,
		unsigned long	second
	)			[inline]

Swaps the elements of the two given columns in the matrix.

Precondition:

The two given columns are distinct and between 0 and columns()-1 inclusive.

Parameters:

	first	the first column to swap.
	second	the second column to swap.

template<class T>

void regina::NMatrix< T >::swapRows	(	unsigned long	first,
		unsigned long	second
	)			[inline]

Swaps the elements of the two given rows in the matrix.

Precondition:

The two given rows are distinct and between 0 and rows()-1 inclusive.

Parameters:

	first	the first row to swap.
	second	the second row to swap.

template<class T>

virtual void regina::NMatrix< T >::writeMatrix

(

std::ostream &

out

)

const [inline, virtual]

Writes a complete representation of the matrix to the given output stream.

Each row will be written on a separate line with elements in each row separated by single spaces.

Python:

Not present, even if a subclass of NMatrix is mirrored and its inherited routines are mirrored also.

Parameters:

out

the output stream to which to write.

---

Member Data Documentation

template<class T>

T** regina::NMatrix< T >::data [protected]

The actual entries in the matrix.

data[r][c] is the element in row r, column c.

template<class T>

unsigned long regina::NMatrix< T >::nCols [protected]

The number of columns in the matrix.

template<class T>

unsigned long regina::NMatrix< T >::nRows [protected]

The number of rows in the matrix.

---

The documentation for this class was generated from the following file:

• nmatrix.h

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Copyright © 1999-2006, Ben Burton
This software is released under the GNU General Public License.
For further information, or to submit a bug or other problem, please contact Ben Burton (bab@debian.org).