qInterp1

One-dimensional interpolation class. More...

Data Structures
struct	qInterp1_t
	A 1D interpolation object. More...

Enumerations
enum	qInterp1Method_t {   QINTERP1_NEXT , QINTERP1_PREVIOUS , QINTERP1_NEAREST , QINTERP1_LINEAR ,   QINTERP1_SINE , QINTERP1_CUBIC , QINTERP1_HERMITE , QINTERP1_SPLINE ,   QINTERP1_CONSTRAINED_SPLINE }
	An enum with all the available interpolation methods. More...

Functions
int	qInterp1_Setup (qInterp1_t *const i, const float *const xTable, const float *const yTable, const size_t sizeTable)
	Setup and initialize the 1D interpolation instance.
int	qInterp1_SetData (qInterp1_t *const i, const float *const xTable, const float *const yTable, const size_t sizeTable)
	Set the data table for the 1D interpolation instance.
int	qInterp1_SetMethod (qInterp1_t *const i, const qInterp1Method_t m)
	Specify the interpolation method to use.
float	qInterp1_Get (qInterp1_t *const i, const float x)
	Interpolate input point x to determine the value of y at the points xi using the current method. If value is beyond the endpoints, extrapolation is performed using the current method.

Detailed Description

One-dimensional interpolation class.

Enumeration Type Documentation

qInterp1Method_t

enum qInterp1Method_t

An enum with all the available interpolation methods.

Enumerator
QINTERP1_NEXT	Return the next neighbor.
QINTERP1_PREVIOUS	Return the previous neighbor.
QINTERP1_NEAREST	Return the nearest neighbor.
QINTERP1_LINEAR	Linear interpolation from nearest neighbors.
QINTERP1_SINE	Sine interpolation.
QINTERP1_CUBIC	Cubic interpolation.
QINTERP1_HERMITE	Piecewise cubic Hermite interpolation.
QINTERP1_SPLINE	Catmull spline interpolation.
QINTERP1_CONSTRAINED_SPLINE	A special kind of spline that doesn't overshoot.

Function Documentation

qInterp1_Get()

float qInterp1_Get	(	qInterp1_t *const	i,
		const float	x )

Interpolate input point x to determine the value of y at the points xi using the current method. If value is beyond the endpoints, extrapolation is performed using the current method.

Parameters

[in]	i	A pointer to the interpolation instance.
[in]	x	The input point.

Returns

The interpolated-extrapolated y value.

qInterp1_SetData()

int qInterp1_SetData	(	qInterp1_t *const	i,
		const float *const	xTable,
		const float *const	yTable,
		const size_t	sizeTable )

Set the data table for the 1D interpolation instance.

Parameters

[in]	i	A pointer to the interpolation instance.
[in]	xTable	An array of size sizeTable with the x points sorted in ascending order.
[in]	yTable	An array of size sizeTable with the y points.
[in]	sizeTable	The number of points in xTable yTable

Returns

1 on success, otherwise return 0.

qInterp1_SetMethod()

int qInterp1_SetMethod	(	qInterp1_t *const	i,
		const qInterp1Method_t	m )

Specify the interpolation method to use.

Parameters

[in]	i	A pointer to the interpolation instance.
[in]	m	The interpolation method.

Returns

1 on success, otherwise return 0.

qInterp1_Setup()

int qInterp1_Setup	(	qInterp1_t *const	i,
		const float *const	xTable,
		const float *const	yTable,
		const size_t	sizeTable )

Setup and initialize the 1D interpolation instance.

Parameters

[in]	i	A pointer to the interpolation instance.
[in]	xTable	An array of size sizeTable with the x points sorted in ascending order.
[in]	yTable	An array of size sizeTable with the y points.
[in]	sizeTable	The number of points in xTable yTable

Returns

1 on success, otherwise return 0.