Time evolution. More...

#include <evolution.h>

Inheritance diagram for Lorene::Evolution< TyT >:

Public Member Functions
virtual	~Evolution ()
	Destructor. More...

virtual void	update (const TyT &new_value, int j, double time_j)=0
	Sets a new value at a given time step. More...

void	downdate (int j)
	Suppresses a stored value. More...

virtual void	operator= (const Evolution< TyT > &t_in)
	Assignement. More...

const TyT &	operator[] (int j) const
	Returns the value at time step j. More...

double	get_time (int j) const
	Returns the time t at time step j. More...

TyT	operator() (double t, int order=2) const
	Returns the value at time t, with a scheme of order `order`. More...

TyT	extrapolate (double t, int order=1) const
	Returns the extrapolated value, with a scheme of order `order`. More...

int	get_size () const
	Returns the member `size`. More...

int	j_min () const
	Returns the smaller time step j stored in `*this`. More...

int	j_max () const
	Returns the larger time step j stored in `*this`. More...

bool	is_known (int j) const
	Checks whether the value a given time step has been set. More...

TyT	time_derive (int j, int n=2) const
	Computes the time derivative at time step `j` by means of a n-th order scheme, from the values at steps `j`, `j-1`, ..., `j-n`. More...

void	save (const char *filename) const
	Saves `*this` in a formatted file. More...

Protected Member Functions
	Evolution (const TyT &initial_value, int initial_j, double initial_time, int initial_size)
	Constructor from some initial value. More...

	Evolution (int initial_size)
	Constructor without any initial value. More...

	Evolution (const Evolution< TyT > &t_in)
	Copy constructor. More...

int	position (int j) const
	Gives the position in the arrays `step`, `the_time` and `val` corresponding to the time step j. More...

int	next_position (int i) const
	Returns the next valid position (returns -1 if none is found) More...

int	previous_position (int i) const
	Returns the previous valid position (returns -1 if none is found) More...

Protected Attributes
int	size
	Maximum number of stored time steps. More...

int *	step
	Array of time step indices (size = `size`). More...

double *	the_time
	Array of values of t at the various time steps (size = `size`). More...

TyT **	val
	Array of pointers onto the values (size = `size`). More...

int	pos_jtop
	Position in the arrays `step`, `the_time` and `val` of the most evolved time step. More...

Detailed Description

template<typename TyT>
class Lorene::Evolution< TyT >

Time evolution.

()

The template class Evolution has been devised to store and manipulate evolving quantities of any type, for instance TyT = double or TyT = Scalar.

Evolution is an abstract base class for classes Evolution_full and Evolution_std.

Definition at line 123 of file evolution.h.

Constructor & Destructor Documentation

◆ Evolution() [1/3]

template<typename TyT>

Lorene::Evolution< TyT >::Evolution	(	const TyT &	initial_value,
		int	initial_j,
		double	initial_time,
		int	initial_size
	)

protected

Constructor from some initial value.

Definition at line 131 of file evolution.C.

◆ Evolution() [2/3]

template<typename TyT>

Lorene::Evolution< TyT >::Evolution ( int initial_size )

protected

Constructor without any initial value.

Definition at line 158 of file evolution.C.

◆ Evolution() [3/3]

template<typename TyT>

Lorene::Evolution< TyT >::Evolution ( const Evolution< TyT > & t_in )

protected

Copy constructor.

Definition at line 182 of file evolution.C.

◆ ~Evolution()

template<typename TyT >

Lorene::Evolution< TyT >::~Evolution ( )

virtual

Destructor.

Definition at line 218 of file evolution.C.

Member Function Documentation

◆ downdate()

template<typename TyT >

void Lorene::Evolution< TyT >::downdate ( int j )

Suppresses a stored value.

Definition at line 248 of file evolution.C.

◆ extrapolate()

template<typename TyT >

TyT Lorene::Evolution< TyT >::extrapolate	(	double	t,
		int	order = `1`
	)		const

Returns the extrapolated value, with a scheme of order order.

Definition at line 467 of file evolution.C.

◆ get_size()

template<typename TyT>

int Lorene::Evolution< TyT >::get_size ( ) const

inline

Returns the member size.

Definition at line 211 of file evolution.h.

◆ get_time()

template<typename TyT>

double Lorene::Evolution< TyT >::get_time ( int j ) const

inline

Returns the time t at time step j.

Definition at line 202 of file evolution.h.

◆ is_known()

template<typename TyT >

bool Lorene::Evolution< TyT >::is_known ( int j ) const

Checks whether the value a given time step has been set.

Parameters

j	time step index

Returns: true if the value at time step j is known, false otherwise

Definition at line 339 of file evolution.C.

◆ j_max()

template<typename TyT >

int Lorene::Evolution< TyT >::j_max ( ) const

Returns the larger time step j stored in *this.

Definition at line 564 of file evolution.C.

◆ j_min()

template<typename TyT >

int Lorene::Evolution< TyT >::j_min ( ) const

Returns the smaller time step j stored in *this.

Definition at line 545 of file evolution.C.

◆ next_position()

template<typename TyT >

int Lorene::Evolution< TyT >::next_position ( int i ) const

protected

Returns the next valid position (returns -1 if none is found)

Definition at line 306 of file evolution.C.

◆ operator()()

template<typename TyT >

TyT Lorene::Evolution< TyT >::operator()	(	double	t,
		int	order = `2`
	)		const

Returns the value at time t, with a scheme of order order.

Definition at line 374 of file evolution.C.

◆ operator=()

template<typename TyT>

void Lorene::Evolution< TyT >::operator= ( const Evolution< TyT > & t_in )

virtual

Assignement.

Reimplemented in Lorene::Evolution_std< TyT >, Lorene::Evolution_std< Lorene::Sym_tensor >, Lorene::Evolution_std< double >, Lorene::Evolution_std< Lorene::Scalar >, Lorene::Evolution_std< Lorene::Vector >, Lorene::Evolution_full< TyT >, and Lorene::Evolution_full< Lorene::Tbl >.

Definition at line 239 of file evolution.C.

template<typename TyT >

void Lorene::Evolution< TyT >::save ( const char * filename ) const

Saves *this in a formatted file.

If TyT = double, this file is readable by 2-D plotting software (e.g. Xmgrace) to produce a curve of the time evolution.

Parameters

filename name of the file: this file will be created in the working directory.

Definition at line 671 of file evolution.C.

◆ time_derive()

template<typename TyT >

TyT Lorene::Evolution< TyT >::time_derive	(	int	j,
		int	n = `2`
	)		const

Computes the time derivative at time step j by means of a n-th order scheme, from the values at steps j, j-1, ..., j-n.

Parameters

j	[input] : value of the time step at which the time derivative is required
n	[input] : order of the time scheme (default value=2); if n=0, then the `Evolution` is considered to be stationary and a null value is returned.

Returns: time derivative at time step j

Definition at line 586 of file evolution.C.

◆ update()

template<typename TyT>

virtual void Lorene::Evolution< TyT >::update	(	const TyT &	new_value,
		int	j,
		double	time_j
	)

TyT** Lorene::Evolution< TyT >::val

protected

Array of pointers onto the values (size = size).

Definition at line 140 of file evolution.h.

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

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<typename TyT> class Lorene::Evolution< TyT >

Constructor & Destructor Documentation

◆ Evolution() [1/3]

◆ Evolution() [2/3]

◆ Evolution() [3/3]

◆ ~Evolution()

Member Function Documentation

◆ downdate()

◆ extrapolate()

◆ get_size()

◆ get_time()

◆ is_known()

◆ j_max()

◆ j_min()

◆ next_position()

◆ operator()()

◆ operator=()

◆ operator[]()

◆ position()

◆ previous_position()

◆ save()

◆ time_derive()

◆ update()

Member Data Documentation

◆ pos_jtop

◆ size

◆ step

◆ the_time

◆ val

template<typename TyT>
class Lorene::Evolution< TyT >