kml_?_spline_init
Initialize interpolation object spline. For data (xarr, yarr), xarr is an array of size xsize, and yarr is a function result array of size xsize. The interpolation object (kml_float_spline or kml_double_spline) does not store xarr and yarr. Instead, it only stores the static states calculated from the data. xarr must be strictly sorted in ascending order.
Interface Definition
int kml_float_spline_init(kml_float_spline *spline, const float xarr[], const float yarr[], const size_t size)
int kml_double_spline_init(kml_double_spline *spline, const double xarr[], const double yarr[], size_t size);
Parameters
Parameter |
Type |
Description |
Input/Output |
|---|---|---|---|
spline |
kml_float_spline* / kml_double_spline* |
Pointer to an interpolation object. |
Output |
xarr |
Float/Double array |
Array that stores the value of x. |
Input |
yarr |
Float/Double array |
Array that stores the value of y. |
Input |
size |
size_t |
Length of the x array. |
Input |
Dependencies
#include "kipl.h"
Examples
const size_t xSize = 4;
float xArr[4] = {1,1.33,1.67,2};
float* yArr = (float*)malloc(xSize * sizeof(float));
kml_float_spline *spline = kml_float_spline_alloc(kml_float_interp_cspline, xSize);
kml_float_spline_init(spline, xArr, yArr, xSize);