LogGrid is a function whose gridpoints increase exponentially with the index. More...

Inheritance diagram for LogGrid:

Collaboration diagram for LogGrid:

Public Member Functions
GridType	Type () override
	Returns the type of the grid (i.e. linear, optimal, etc) More...

int	ReverseMap (double r) override
	Returns the index of the nearest point below r. More...

	LogGrid ()

void	Init (double R0, double spacing, int numpoints)

void	Write (IOSectionClass &outSection) override

void	Read (IOSectionClass &inSection) override

	LogGrid (double R0, double spacing, int numpoints)

	LogGrid (int numpoints, double z, double R0, double spacing)

Public Member Functions inherited from Grid
double	operator() (int i) const
	The i'th point in the grid. More...

double *	data ()

Array< double, 1 > &	Points ()

virtual	~Grid ()

Public Attributes
double	Z

double	r0

double	Spacing

Public Attributes inherited from Grid
double	Start
	First and last grid points. More...

double	End

int	NumPoints
	Number of points in the grid. More...

Additional Inherited Members
Protected Attributes inherited from Grid
Array< double, 1 >	grid
	Contains the grid points. More...

Detailed Description

LogGrid is a function whose gridpoints increase exponentially with the index.

That is, it has the analytic form

$r_k = \frac{r_0}{Z} \Delta^k.$

It is appropriate for functions which change rapidly near the origin but vary smoothly further out.

Definition at line 509 of file Grid.h.

Constructor & Destructor Documentation

◆ LogGrid() [1/3]

LogGrid ( )

inline

Definition at line 518 of file Grid.h.

   {
     // Do nothing
   }

◆ LogGrid() [2/3]

LogGrid	(	double	R0,
		double	spacing,
		int	numpoints
	)

inline

Definition at line 556 of file Grid.h.

References Init().

556 { Init(R0, spacing, numpoints); }

LogGrid::Init

void Init(double R0, double spacing, int numpoints)

Definition: Grid.h:523

◆ LogGrid() [3/3]

LogGrid	(	int	numpoints,
		double	z,
		double	R0,
		double	spacing
	)

inline

Definition at line 558 of file Grid.h.

References Grid::End, Grid::grid, Grid::NumPoints, qmcplusplus::pow(), r0, Array< T, D, ALLOC >::resize(), Spacing, Grid::Start, and Z.

   {
     NumPoints = numpoints;
     Z         = z;
     r0        = R0;
     Spacing   = spacing;
 
     Start = r0 / Z;
     End   = r0 / Z * pow(Spacing, (double)(NumPoints - 1));
 
     grid.resize(NumPoints);
 
     for (int i = 0; i < NumPoints; i++)
       grid(i) = r0 / Z * pow(Spacing, (double)i);
   }

Member Function Documentation

◆ Init()

void Init	(	double	R0,
		double	spacing,
		int	numpoints
	)

inline

Definition at line 523 of file Grid.h.

References Grid::End, Grid::grid, Grid::NumPoints, qmcplusplus::pow(), r0, Array< T, D, ALLOC >::resize(), Spacing, Grid::Start, and Z.

Referenced by LogGrid(), and Read().

   {
     NumPoints = numpoints;
     Z         = 1.0;
     r0        = R0;
     Spacing   = spacing;
     Start     = r0;
     End       = r0 * pow(Spacing, (double)NumPoints - 1);
     grid.resize(NumPoints);
 
     for (int i = 0; i < NumPoints; i++)
       grid(i) = r0 * pow(Spacing, (double)i);
   }

◆ Read()

void Read ( IOSectionClass & inSection )

inlineoverridevirtual

Implements Grid.

Definition at line 546 of file Grid.h.

References Init(), and IOSectionClass::ReadVar().

   {
     double tempr0, tempSpacing;
     int tempNumPoints;
     assert(inSection.ReadVar("r0", tempr0));
     assert(inSection.ReadVar("Spacing", tempSpacing));
     assert(inSection.ReadVar("NumPoints", tempNumPoints));
     Init(tempr0, tempSpacing, tempNumPoints);
   }

◆ ReverseMap()

int ReverseMap ( double r )

inlineoverridevirtual

Returns the index of the nearest point below r.

Implements Grid.

Definition at line 516 of file Grid.h.

References qmcplusplus::floor(), qmcplusplus::log(), r0, Spacing, and Z.

516 { return ((int)(floor(log(Z * r / r0) / log(Spacing)))); }

LogGrid::r0

double r0

Definition: Grid.h:512

LogGrid::Z

double Z

Definition: Grid.h:512

LogGrid::Spacing

double Spacing

Definition: Grid.h:512

qmcplusplus::log

MakeReturn< UnaryNode< FnLog, typename CreateLeaf< Vector< T1, C1 > >::Leaf_t > >::Expression_t log(const Vector< T1, C1 > &l)

Definition: OhmmsVectorOperators.h:104

qmcplusplus::floor

MakeReturn< UnaryNode< FnFloor, typename CreateLeaf< Vector< T1, C1 > >::Leaf_t > >::Expression_t floor(const Vector< T1, C1 > &l)

Definition: OhmmsVectorOperators.h:96

◆ Type()

GridType Type ( )

inlineoverridevirtual

Returns the type of the grid (i.e. linear, optimal, etc)

Implements Grid.

Definition at line 514 of file Grid.h.

References LOG.

514 { return (LOG); }

LOG

Definition: Grid.h:35

◆ Write()

void Write ( IOSectionClass & outSection )

inlineoverridevirtual

Implements Grid.

Definition at line 538 of file Grid.h.

References Grid::grid, r0, Spacing, and IOSectionClass::WriteVar().

   {
     outSection.WriteVar("Points", grid);
     outSection.WriteVar("Type", std::string("Log"));
     outSection.WriteVar("r0", r0);
     outSection.WriteVar("Spacing", Spacing);
   }