CDPL.Math.DMatrix Class Reference

Unbounded dense matrix holding floating point values of type double. More...

Inheritance diagram for CDPL.Math.DMatrix:

Public Member Functions
None	__init__ ()
	Constructs an empty matrix (zero rows and zero columns).
None	__init__ (DMatrix m)
	Move-constructs a matrix from m (m is left in a valid empty state). More...
None	__init__ (int m, int n)
	Constructs an m × n matrix with default-initialized elements. More...
None	__init__ (int m, int n, float v)
	Constructs an m × n matrix with every element initialized to v. More...
None	__init__ (ConstFMatrixExpression e)
	Initializes the DMatrix instance. More...
None	__init__ (ConstDMatrixExpression e)
	Initializes the DMatrix instance. More...
None	__init__ (ConstLMatrixExpression e)
	Initializes the DMatrix instance. More...
None	__init__ (ConstULMatrixExpression e)
	Initializes the DMatrix instance. More...
None	__init__ (object a)
	Initializes the DMatrix instance. More...
None	resize (int m, int n, bool preserve=True, float v=0.0)
	Resizes the matrix to \( m \times n \) elements. More...
None	clear (float v=0.0)
	Sets every element of the matrix to the value v. More...
int	getObjectID ()
	Returns the numeric identifier (ID) of the wrapped C++ class instance. More...
DMatrix	assign (ConstFMatrixExpression e)
	Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary). More...
DMatrix	assign (ConstDMatrixExpression e)
	Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary). More...
DMatrix	assign (ConstLMatrixExpression e)
	Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary). More...
DMatrix	assign (ConstULMatrixExpression e)
	Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary). More...
DMatrix	assign (DMatrix m)
	Move-assigns the contents of m to this matrix. More...
None	assign (object a)
	Replaces the current state of self with a copy of the state of the object instance a. More...
int	getSize1 ()
	Returns the number of rows. More...
int	getSize2 ()
	Returns the number of columns. More...
bool	isEmpty ()
	Tells whether the matrix is empty. More...
float	getElement (int i, int j)
object	toArray ()
None	swap (DMatrix m)
	Swaps the contents of this matrix with those of m. More...
None	setElement (int i, int j, float v)
float	__call__ (int i, int j)
	Returns a reference to the element at (i, j). More...
float	__getitem__ (tuple ij)
int	__len__ ()
bool	__eq__ (DMatrix m)
	Returns the result of the comparison operation self == m. More...
bool	__eq__ (ConstDMatrixExpression e)
	Returns the result of the comparison operation self == e. More...
bool	__ne__ (DMatrix m)
	Returns the result of the comparison operation self != m. More...
bool	__ne__ (ConstDMatrixExpression e)
	Returns the result of the comparison operation self != e. More...
str	__str__ ()
	Returns a string representation of the DMatrix instance. More...
DMatrix	__pos__ ()
ConstDMatrixExpression	__neg__ ()
ConstDMatrixExpression	__add__ (ConstDMatrixExpression e)
	Returns the result of the addition operation self + e. More...
ConstDMatrixExpression	__sub__ (ConstDMatrixExpression e)
	Returns the result of the subtraction operation self - e. More...
ConstDMatrixExpression	__mul__ (float t)
	Returns the result of the multiplication operation self * t. More...
ConstDMatrixExpression	__mul__ (ConstDMatrixExpression e)
	Returns the result of the multiplication operation self * e. More...
ConstDVectorExpression	__mul__ (ConstDVectorExpression e)
	Returns the result of the multiplication operation self * e. More...
ConstDMatrixExpression	__div__ (float t)
	Returns the result of the division operation self // t. More...
ConstDMatrixExpression	__truediv__ (float t)
	Returns the result of the true division operation self / t. More...
ConstDMatrixExpression	__rmul__ (float t)
	Returns the result of the multiplication operation t * self. More...
None	__setitem__ (tuple ij, float v)
DMatrix	__iadd__ (DMatrix m)
	Performs the in-place addition operation self += m. More...
DMatrix	__iadd__ (ConstDMatrixExpression e)
	Performs the in-place addition operation self += e. More...
DMatrix	__isub__ (DMatrix m)
	Performs the in-place subtraction operation self -= m. More...
DMatrix	__isub__ (ConstDMatrixExpression e)
	Performs the in-place subtraction operation self -= e. More...
DMatrix	__imul__ (float t)
	Performs the in-place multiplication operation self *= t. More...
DMatrix	__idiv__ (float t)
	Performs the in-place division operation self /= t. More...
DMatrix	__itruediv__ (float t)

Properties
	objectID = property(getObjectID)
	size1 = property(getSize1)
	size2 = property(getSize2)

Detailed Description

Unbounded dense matrix holding floating point values of type double.

Constructor & Destructor Documentation

__init__() [1/8]

None CDPL.Math.DMatrix.__init__

(

DMatrix

m

)

Move-constructs a matrix from m (m is left in a valid empty state).

Parameters

m	The matrix to move from.

__init__() [2/8]

None CDPL.Math.DMatrix.__init__	(	int	m,
		int	n
	)

Constructs an m × n matrix with default-initialized elements.

Parameters

m	The number of rows.
n	The number of columns.

__init__() [3/8]

None CDPL.Math.DMatrix.__init__	(	int	m,
		int	n,
		float	v
	)

Constructs an m × n matrix with every element initialized to v.

Parameters

m	The number of rows.
n	The number of columns.
v	The element value used to initialize every cell.

__init__() [4/8]

None CDPL.Math.DMatrix.__init__

(

ConstFMatrixExpression

e

)

Initializes the DMatrix instance.

Parameters

e

__init__() [5/8]

None CDPL.Math.DMatrix.__init__

(

ConstDMatrixExpression

e

)

Initializes the DMatrix instance.

Parameters

e

__init__() [6/8]

None CDPL.Math.DMatrix.__init__

(

ConstLMatrixExpression

e

)

Initializes the DMatrix instance.

Parameters

e

__init__() [7/8]

None CDPL.Math.DMatrix.__init__

(

ConstULMatrixExpression

e

)

Initializes the DMatrix instance.

Parameters

e

__init__() [8/8]

None CDPL.Math.DMatrix.__init__

(

object

a

)

Initializes the DMatrix instance.

Parameters

a

Member Function Documentation

resize()

None CDPL.Math.DMatrix.resize	(	int	m,
		int	n,
		bool	preserve = True,
		float	v = 0.0
	)

Resizes the matrix to \( m \times n \) elements.

Parameters

m	The new row count.
n	The new column count.
preserve	If True, existing element values at indices that remain valid are kept. If False, all elements are set to v.
v	The fill value for newly added elements (or for all elements when preserve is False).

clear()

None CDPL.Math.DMatrix.clear

(

float

v = 0.0

)

Sets every element of the matrix to the value v.

Parameters

v	The fill value.

getObjectID()

int CDPL.Math.DMatrix.getObjectID

(

)

Returns the numeric identifier (ID) of the wrapped C++ class instance.

Different Python DMatrix instances may reference the same underlying C++ class instance. The commonly used Python expression a is not b thus cannot tell reliably whether the two DMatrix instances a and b reference different C++ objects. The numeric identifier returned by this method allows to correctly implement such an identity test via the simple expression a.getObjectID() != b.getObjectID().

Returns

The numeric ID of the internally referenced C++ class instance.

assign() [1/6]

DMatrix CDPL.Math.DMatrix.assign

(

ConstFMatrixExpression

e

)

Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary).

Parameters

e	The source matrix expression.

Returns

self

assign() [2/6]

DMatrix CDPL.Math.DMatrix.assign

(

ConstDMatrixExpression

e

)

Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary).

Parameters

e	The source matrix expression.

Returns

self

assign() [3/6]

DMatrix CDPL.Math.DMatrix.assign

(

ConstLMatrixExpression

e

)

Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary).

Parameters

e	The source matrix expression.

Returns

self

assign() [4/6]

DMatrix CDPL.Math.DMatrix.assign

(

ConstULMatrixExpression

e

)

Resizes this matrix to match the dimensions of e and assigns its elements (without intermediate temporary).

Parameters

e	The source matrix expression.

Returns

self

assign() [5/6]

DMatrix CDPL.Math.DMatrix.assign

(

DMatrix

m

)

Move-assigns the contents of m to this matrix.

Parameters

m	The source matrix (left in a valid but unspecified state).

Returns

self

assign() [6/6]

None CDPL.Math.DMatrix.assign

(

object

a

)

Replaces the current state of self with a copy of the state of the object instance a.

Parameters

a	The object instance to copy.

Returns

self

getSize1()

int CDPL.Math.DMatrix.getSize1

(

)

Returns the number of rows.

Returns

The number of rows.

getSize2()

int CDPL.Math.DMatrix.getSize2

(

)

Returns the number of columns.

Returns

The number of columns.

isEmpty()

bool CDPL.Math.DMatrix.isEmpty

(

)

Tells whether the matrix is empty.

Returns

True if the underlying storage holds no elements, and False otherwise.

getElement()

float CDPL.Math.DMatrix.getElement	(	int	i,
		int	j
	)

Parameters

i
j

Returns

toArray()

object CDPL.Math.DMatrix.toArray

(

)

Returns

swap()

None CDPL.Math.DMatrix.swap

(

DMatrix

m

)

Swaps the contents of this matrix with those of m.

Parameters

m	The matrix to swap with.

setElement()

None CDPL.Math.DMatrix.setElement	(	int	i,
		int	j,
		float	v
	)

Parameters

i
j
v

__call__()

float CDPL.Math.DMatrix.__call__	(	int	i,
		int	j
	)

Returns a reference to the element at (i, j).

Parameters

i	The zero-based row index.
j	The zero-based column index.

Returns

A reference to the element.

Exceptions

Base.IndexError

if either index is out of range.

__getitem__()

float CDPL.Math.DMatrix.__getitem__

(

tuple

ij

)

Parameters

ij

Returns

__len__()

int CDPL.Math.DMatrix.__len__

(

)

Returns

__eq__() [1/2]

bool CDPL.Math.DMatrix.__eq__

(

DMatrix

m

)

Returns the result of the comparison operation self == m.

Parameters

m	The DMatrix instance to be compared with.

Returns

The result of the comparison operation.

__eq__() [2/2]

bool CDPL.Math.DMatrix.__eq__

(

ConstDMatrixExpression

e

)

Returns the result of the comparison operation self == e.

Parameters

e	The ConstDMatrixExpression instance to be compared with.

Returns

The result of the comparison operation.

__ne__() [1/2]

bool CDPL.Math.DMatrix.__ne__

(

DMatrix

m

)

Returns the result of the comparison operation self != m.

Parameters

m	The DMatrix instance to be compared with.

Returns

The result of the comparison operation.

__ne__() [2/2]

bool CDPL.Math.DMatrix.__ne__

(

ConstDMatrixExpression

e

)

Returns the result of the comparison operation self != e.

Parameters

e	The ConstDMatrixExpression instance to be compared with.

Returns

The result of the comparison operation.

__str__()

str CDPL.Math.DMatrix.__str__

(

)

Returns a string representation of the DMatrix instance.

Returns

The generated string representation.

__pos__()

DMatrix CDPL.Math.DMatrix.__pos__

(

)

Returns

__neg__()

ConstDMatrixExpression CDPL.Math.DMatrix.__neg__

(

)

Returns

__add__()

ConstDMatrixExpression CDPL.Math.DMatrix.__add__

(

ConstDMatrixExpression

e

)

Returns the result of the addition operation self + e.

Parameters

e	Specifies the second addend.

Returns

A ConstDMatrixExpression instance holding the result of the addition.

__sub__()

ConstDMatrixExpression CDPL.Math.DMatrix.__sub__

(

ConstDMatrixExpression

e

)

Returns the result of the subtraction operation self - e.

Parameters

e	Specifies the subtrahend.

Returns

A DMatrix instance holding the result of the subtraction.

__mul__() [1/3]

ConstDMatrixExpression CDPL.Math.DMatrix.__mul__

(

float

t

)

Returns the result of the multiplication operation self * t.

Parameters

t	Specifies the multiplier.

Returns

A ConstDMatrixExpression instance holding the result of the multiplication.

__mul__() [2/3]

ConstDMatrixExpression CDPL.Math.DMatrix.__mul__

(

ConstDMatrixExpression

e

)

Returns the result of the multiplication operation self * e.

Parameters

e	Specifies the multiplier.

Returns

A ConstDMatrixExpression instance holding the result of the multiplication.

__mul__() [3/3]

ConstDVectorExpression CDPL.Math.DMatrix.__mul__

(

ConstDVectorExpression

e

)

Returns the result of the multiplication operation self * e.

Parameters

e	Specifies the multiplier.

Returns

A ConstDVectorExpression instance holding the result of the multiplication.

__div__()

ConstDMatrixExpression CDPL.Math.DMatrix.__div__

(

float

t

)

Returns the result of the division operation self // t.

Parameters

t	Specifies the divisor.

Returns

A ConstDMatrixExpression instance holding the result of the division.

__truediv__()

ConstDMatrixExpression CDPL.Math.DMatrix.__truediv__

(

float

t

)

Returns the result of the true division operation self / t.

Parameters

t	Specifies the divisor.

Returns

A ConstDMatrixExpression instance holding the result of the division.

__rmul__()

ConstDMatrixExpression CDPL.Math.DMatrix.__rmul__

(

float

t

)

Returns the result of the multiplication operation t * self.

Parameters

t	Specifies the multiplicand.

Returns

A ConstDMatrixExpression instance holding the result of the multiplication.

__setitem__()

None CDPL.Math.DMatrix.__setitem__	(	tuple	ij,
		float	v
	)

Parameters

ij
v

__iadd__() [1/2]

DMatrix CDPL.Math.DMatrix.__iadd__

(

DMatrix

m

)

Performs the in-place addition operation self += m.

Parameters

m	Specifies the second addend.

Returns

The updated DMatrix instance self.

__iadd__() [2/2]

DMatrix CDPL.Math.DMatrix.__iadd__

(

ConstDMatrixExpression

e

)

Performs the in-place addition operation self += e.

Parameters

e	Specifies the second addend.

Returns

The updated DMatrix instance self.

__isub__() [1/2]

DMatrix CDPL.Math.DMatrix.__isub__

(

DMatrix

m

)

Performs the in-place subtraction operation self -= m.

Parameters

m	Specifies the subtrahend.

Returns

The updated DMatrix instance self.

__isub__() [2/2]

DMatrix CDPL.Math.DMatrix.__isub__

(

ConstDMatrixExpression

e

)

Performs the in-place subtraction operation self -= e.

Parameters

e	Specifies the subtrahend.

Returns

The updated DMatrix instance self.

__imul__()

DMatrix CDPL.Math.DMatrix.__imul__

(

float

t

)

Performs the in-place multiplication operation self *= t.

Parameters

t	Specifies the multiplier.

Returns

The updated DMatrix instance self.

__idiv__()

DMatrix CDPL.Math.DMatrix.__idiv__

(

float

t

)

Performs the in-place division operation self /= t.

Parameters

t	Specifies the divisor.

Returns

The updated DMatrix instance self.

__itruediv__()

DMatrix CDPL.Math.DMatrix.__itruediv__

(

float

t

)

Parameters

t

Returns