Class for storing data about an individual sweep parameter. More...

#include <SweepParameter.h>

Public Member Functions
	SweepParameter ()
	Default constructor.

	SweepParameter (System< D > &system)
	Constructor that stores a pointer to parent system.

void	setSystem (System< D > &system)
	Set the system associated with this object.

void	setParameterTypesArray (GArray< ParameterType > &array)
	Set the pointer to the array of specialized sweep parameter types.

ParameterType &	parameterType () const
	Get the ParameterType object for a specialized sweep parameter.

int	parameterTypeId () const
	Get the array index for the specialized sweep parameter.

bool	isSpecialized () const
	Is this SweepParameter a specialized parameter type?

void	getInitial ()
	Store the pre-sweep value of the corresponding parameter.

void	update (double newVal)
	Update the corresponding parameter value in the system.

std::string	type () const
	Return a string representation of the parameter type.

void	writeParamType (std::ostream &out) const
	Write the parameter type to an output stream.

int	id (int i) const
	Get a id for a sub-object or element to which this is applied.

double	current ()
	Return the current system parameter value.

double	initial () const
	Return the initial system parameter value.

double	change () const
	Return the total change planned for this parameter during sweep.

template<class Archive >
void	serialize (Archive ar, const unsigned int version)
	Serialize to or from an archive.

Detailed Description

template<int D>
class Pscf::Rpg::SweepParameter< D >

Class for storing data about an individual sweep parameter.

This class stores the information required to sweep a single parameter value of any of several types. The type of parameter is indicated in the public interface and parameter file format by a string identifier with any of several allowed values. Each parameter is also identified by one or two associated index values, denoted here by id(0) and id(1), that specify the index or indices for a subobject or array element with which the parameter is associated applied. Allowed string representations and meanings of parameter types are given below, along with the meaning of any associated index value or pair of values. To indicate the meaning of index values, we use mId to denote a monomer type index, pId to denote a polymer species index, bId to denote the index of a block within a polymer, sId to denote a solvent species index, and lId to denote a lattice parameter index:

| Type        | Meaning                     | id(0) | id(1)
| ----------- | --------------------------- | ----- | -----
| kuhn        | monomer segment length      | mId   |
| chi         | Flory-Huggins parameter     | mId   | mId
| block       | block length                | pId   | bId
| solvent     | solvent size                | sId   |
| phi_polymer | polymer volume fraction     | pId   |
| mu_polymer  | polymer chemical potential  | pId   |
| phi_solvent | solvent volume fraction     | sId   |
| mu_solvent  | solvent chemical potential  | sId   |
| cell_param  | lattice parameter           | lId   |

The two indices for a Flory-Huggins chi parameter refer to indices in the chi matrix maintained by Interaction. Changes to element chi(i, j) automatically also update chi(j, i) for i !\ j, thus maintaining the symmetry of the matrix.

Each SweepParameter also has a "change" value that gives the intended difference between the final and initial value of the parameter over the course of a sweep, corresponding to a change sweep parameter s over the range [0,1]. The initial value of each parameter is obtained from a query of the state of the parent system at the beginning of a sweep, and thus does not need to be supplied as part of the text format for a SweepParameter.

A SweepParameter<D> object is initialized by reading the parameter type, index or index and change value from a parameter file as a a single line. An overloaded >> operator is defined that allows a SweepParameter<D> object named "parameter" to be read from an istream named "in" using the syntax "in >> parameter".

The text format for a parameter of a type that requires a single index id(0) is:

type id(0) change

where type indicates a type string, id(0) is an integer index value, and change is the a floating point value for the change in parameter value. The corresponding format for a parameter that requires two indices (e.g., block or chi) is instead: "type id(0) id(1) change".

All parameter types in the table above are hard-coded into this class, but this class has been written so that certain classes can also add "specialized" parameters to the list SweepTmpl::parameterTypes_ using the method SweepTmpl::addParameterTypes. This list of specialized parameters is then consulted if the user-specified parameter type is not found in the list of hard-coded parameter names. In order to add parameters to SweepTmpl::parameterTypes_, a class must be a subclass of ParameterModifier.

Currently, the only classes that can add parameters to parameterTypes_ are Iterators. The Iterator for a given calculation is determined via a Factory, so the type of Iterator is not known until run time. Therefore, Iterators can add sweepable parameters to parameterTypes_ as necessary at run time, depending on the type of Iterator used in that calculation. As a design principle, an object that is created by a Factory and used for SCFT calculations should also be a subclass of ParameterModifier so that it can add sweepable parameters at run time.

Definition at line 105 of file rpg/scft/sweep/SweepParameter.h.

Constructor & Destructor Documentation

◆ SweepParameter() [1/2]

template<int D>

Pscf::Rpg::SweepParameter< D >::SweepParameter ( )

Default constructor.

Definition at line 36 of file rpg/scft/sweep/SweepParameter.tpp.

◆ SweepParameter() [2/2]

template<int D>

Pscf::Rpg::SweepParameter< D >::SweepParameter ( System< D > & system )

Constructor that stores a pointer to parent system.

Parameters

system parent system

Definition at line 51 of file rpg/scft/sweep/SweepParameter.tpp.

Member Function Documentation

◆ setSystem()

template<int D>

void Pscf::Rpg::SweepParameter< D >::setSystem ( System< D > & system )

inline

Set the system associated with this object.

Invoke this function on objects created with the default constructor to create an association with a parent system.

Parameters

system parent system

Definition at line 130 of file rpg/scft/sweep/SweepParameter.h.

◆ setParameterTypesArray()

template<int D>

void Pscf::Rpg::SweepParameter< D >::setParameterTypesArray ( GArray< ParameterType > & array )

inline

Set the pointer to the array of specialized sweep parameter types.

Parameters

array array of specialized parameter types

Definition at line 138 of file rpg/scft/sweep/SweepParameter.h.

◆ parameterType()

template<int D>

ParameterType & Pscf::Rpg::SweepParameter< D >::parameterType ( ) const

Get the ParameterType object for a specialized sweep parameter.

An error will result if this SweepParameter is not specialized and this function is called.

Definition at line 138 of file rpg/scft/sweep/SweepParameter.tpp.

References UTIL_CHECK.

◆ parameterTypeId()

template<int D>

int Pscf::Rpg::SweepParameter< D >::parameterTypeId ( ) const

inline

Get the array index for the specialized sweep parameter.

Definition at line 152 of file rpg/scft/sweep/SweepParameter.h.

◆ isSpecialized()

template<int D>

bool Pscf::Rpg::SweepParameter< D >::isSpecialized ( ) const

inline

Is this SweepParameter a specialized parameter type?

Definition at line 158 of file rpg/scft/sweep/SweepParameter.h.

◆ getInitial()

template<int D>

void Pscf::Rpg::SweepParameter< D >::getInitial ( )

Store the pre-sweep value of the corresponding parameter.

Definition at line 148 of file rpg/scft/sweep/SweepParameter.tpp.

◆ update()

template<int D>

void Pscf::Rpg::SweepParameter< D >::update ( double newVal )

Update the corresponding parameter value in the system.

Parameters

newVal new value for the parameter (input)

Definition at line 157 of file rpg/scft/sweep/SweepParameter.tpp.

◆ type()

template<int D>

std::string Pscf::Rpg::SweepParameter< D >::type ( ) const

Return a string representation of the parameter type.

Definition at line 166 of file rpg/scft/sweep/SweepParameter.tpp.

References UTIL_THROW.

Referenced by pscfpp.field.Field::__init__(), pscfpp.field.Field::__str__(), and pscfpp.field.Field::read().

◆ writeParamType()

template<int D>

void Pscf::Rpg::SweepParameter< D >::writeParamType ( std::ostream & out ) const

Write the parameter type to an output stream.

Parameters

out	output file stream

Definition at line 129 of file rpg/scft/sweep/SweepParameter.tpp.

Referenced by Pscf::Rpg::operator<<().

◆ id()

template<int D>

int Pscf::Rpg::SweepParameter< D >::id ( int i ) const

inline

Get a id for a sub-object or element to which this is applied.

This function returns a value from the id_ array. Elements of this array store indices associating the parameter with a particular subobject or value. Different types of parameters require either 1 or 2 such identifiers. The number of required identifiers is denoted by private variable nId_.

Parameters

i	array index to access

Definition at line 198 of file rpg/scft/sweep/SweepParameter.h.

Referenced by Pscf::Rpg::operator<<().

◆ current()

template<int D>

double Pscf::Rpg::SweepParameter< D >::current ( )

inline

Return the current system parameter value.

Definition at line 204 of file rpg/scft/sweep/SweepParameter.h.

◆ initial()

template<int D>

double Pscf::Rpg::SweepParameter< D >::initial ( ) const

inline

Return the initial system parameter value.

Definition at line 210 of file rpg/scft/sweep/SweepParameter.h.

◆ change()

template<int D>

double Pscf::Rpg::SweepParameter< D >::change ( ) const

inline

Return the total change planned for this parameter during sweep.

Definition at line 216 of file rpg/scft/sweep/SweepParameter.h.

◆ serialize()

template<int D>

template<class Archive >

void Pscf::Rpg::SweepParameter< D >::serialize	(	Archive	ar,
		const unsigned int	version )

Serialize to or from an archive.

Parameters

ar	Archive object
version	archive format version index

Definition at line 257 of file rpg/scft/sweep/SweepParameter.tpp.

References Util::serializeEnum().

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

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ SweepParameter() [1/2]

◆ SweepParameter() [2/2]

Member Function Documentation

◆ setSystem()

◆ setParameterTypesArray()

◆ parameterType()

◆ parameterTypeId()

◆ isSpecialized()

◆ getInitial()

◆ update()

◆ type()

◆ writeParamType()

◆ id()

◆ current()

◆ initial()

◆ change()

◆ serialize()