janus::ScatteredInterpolator Class Reference

#include <ScatteredInterpolator.hpp>

Public Member Functions
	ScatteredInterpolator ()=default
	Default constructor (invalid state).
	ScatteredInterpolator (const NumericMatrix &points, const NumericVector &values, int grid_resolution=20, RBFKernel kernel=RBFKernel::ThinPlateSpline, double epsilon=1.0, InterpolationMethod method=InterpolationMethod::Linear)
	Construct from scattered N-D points with uniform grid resolution.
	ScatteredInterpolator (const NumericMatrix &points, const NumericVector &values, const std::vector< NumericVector > &grid_points, RBFKernel kernel=RBFKernel::ThinPlateSpline, double epsilon=1.0, InterpolationMethod method=InterpolationMethod::Linear)
	Construct with explicit per-dimension grid specification.
	ScatteredInterpolator (const NumericVector &x, const NumericVector &y, int grid_resolution=50, RBFKernel kernel=RBFKernel::ThinPlateSpline)
	1D convenience constructor
template<JanusScalar Scalar>
Scalar	operator() (const JanusVector< Scalar > &query) const
	Evaluate at N-D point.
template<JanusScalar Scalar>
Scalar	operator() (const Scalar &query) const
	Evaluate at scalar (1D only).
int	dims () const
	Get number of input dimensions.
bool	valid () const
	Check if interpolator is valid (initialized).
const Interpolator &	gridded () const
	Get underlying gridded interpolator (for inspection).
double	reconstruction_error () const
	Get RMS reconstruction error at original scattered points.

Constructor & Destructor Documentation

ScatteredInterpolator() [1/4]

janus::ScatteredInterpolator::ScatteredInterpolator ( )

default

Default constructor (invalid state).

ScatteredInterpolator() [2/4]

janus::ScatteredInterpolator::ScatteredInterpolator ( const NumericMatrix & points, const NumericVector & values, int grid_resolution = 20, RBFKernel kernel = RBFKernel::ThinPlateSpline, double epsilon = 1.0, InterpolationMethod method = InterpolationMethod::Linear )

inline

Construct from scattered N-D points with uniform grid resolution.

Parameters

points	Data locations, shape (n_points, n_dims)
values	Function values at each point (length n_points)
grid_resolution	Points per dimension for resampling grid
kernel	RBF kernel type (default: ThinPlateSpline)
epsilon	Shape parameter for Multiquadric/Gaussian kernels
method	Gridded interpolation method for final queries

Exceptions

InterpolationError

if inputs are invalid

ScatteredInterpolator() [3/4]

janus::ScatteredInterpolator::ScatteredInterpolator ( const NumericMatrix & points, const NumericVector & values, const std::vector< NumericVector > & grid_points, RBFKernel kernel = RBFKernel::ThinPlateSpline, double epsilon = 1.0, InterpolationMethod method = InterpolationMethod::Linear )

inline

Construct with explicit per-dimension grid specification.

Parameters

points	Data locations, shape (n_points, n_dims)
values	Function values at each point
grid_points	Explicit grid coordinates per dimension
kernel	RBF kernel type
epsilon	Shape parameter for Multiquadric/Gaussian kernels
method	Gridded interpolation method for final queries

ScatteredInterpolator() [4/4]

janus::ScatteredInterpolator::ScatteredInterpolator ( const NumericVector & x, const NumericVector & y, int grid_resolution = 50, RBFKernel kernel = RBFKernel::ThinPlateSpline )

inline

1D convenience constructor

Parameters

x	Scattered x-coordinates
y	Function values at each x
grid_resolution	Points for resampling grid
kernel	RBF kernel type

Member Function Documentation

dims()

int janus::ScatteredInterpolator::dims ( ) const

inline

Get number of input dimensions.

Returns

Number of dimensions

gridded()

const Interpolator & janus::ScatteredInterpolator::gridded ( ) const

inline

Get underlying gridded interpolator (for inspection).

Returns

Reference to gridded interpolator

operator()() [1/2]

template<JanusScalar Scalar>

Scalar janus::ScatteredInterpolator::operator() ( const JanusVector< Scalar > & query ) const

inline

Evaluate at N-D point.

Template Parameters

Scalar

Scalar type (NumericScalar or SymbolicScalar)

Parameters

query

Query point vector

Returns

Interpolated value

operator()() [2/2]

template<JanusScalar Scalar>

Scalar janus::ScatteredInterpolator::operator() ( const Scalar & query ) const

inline

Evaluate at scalar (1D only).

Template Parameters

Scalar

Scalar type (NumericScalar or SymbolicScalar)

Parameters

query

Scalar query value

Returns

Interpolated value

reconstruction_error()

double janus::ScatteredInterpolator::reconstruction_error ( ) const

inline

Get RMS reconstruction error at original scattered points.

Measures how well the gridded approximation reproduces the original scattered data. Lower is better.

valid()

bool janus::ScatteredInterpolator::valid ( ) const

inline

Check if interpolator is valid (initialized).

Returns

True if initialized

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

• include/janus/math/ScatteredInterpolator.hpp