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Object-oriented Scientific Computing Library: Version 0.910
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Cubic spline interpolation (GSL) More...
#include <interp.h>
By default, this class uses natural boundary conditions, where the second derivative vanishes at each end point. Extrapolation effectively assumes that the second derivative is linear outside of the endpoints.
Public Member Functions | |
cspline_interp () | |
Create a base interpolation object with natural or periodic boundary conditions. | |
virtual int | allocate (size_t size) |
Allocate memory, assuming x and y have size size . | |
virtual int | init (const vec_t &xa, const vec_t &ya, size_t size) |
Initialize interpolation routine. | |
virtual int | free () |
Free allocated memory. | |
virtual int | interp (const vec_t &x_array, const vec_t &y_array, size_t size, double x, double &y) |
Give the value of the function ![]() | |
virtual int | deriv (const vec_t &x_array, const vec_t &y_array, size_t size, double x, double &dydx) |
Give the value of the derivative ![]() | |
virtual int | deriv2 (const vec_t &x_array, const vec_t &y_array, size_t size, double x, double &d2ydx2) |
Give the value of the second derivative ![]() | |
virtual int | integ (const vec_t &x_array, const vec_t &y_array, size_t size, double a, double b, double &result) |
Give the value of the integral ![]() | |
virtual const char * | type () |
Return the type, "cspline_interp" . | |
Protected Member Functions | |
void | coeff_calc (const double c_array[], double dy, double dx, size_t index, double *b, double *c2, double *d) |
Compute coefficients for cubic spline interpolation. | |
Protected Attributes | |
o2scl_linalg::uvector_4_mem | p4m |
Memory for the tridiagonalization. | |
Storage for cubic spline interpolation | |
double * | c |
double * | g |
double * | diag |
double * | offdiag |
Private Member Functions | |
cspline_interp (const cspline_interp< vec_t > &) | |
cspline_interp< vec_t > & | operator= (const cspline_interp< vec_t > &) |
virtual int cspline_interp< vec_t >::init | ( | const vec_t & | xa, |
const vec_t & | ya, | ||
size_t | size | ||
) | [inline, virtual] |
Natural boundary conditions
Reimplemented from base_interp< vec_t >.
Reimplemented in cspline_peri_interp< vec_t >.
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