Class interp_akima (o2scl)¶
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template<class
vec_t
, classvec2_t
= vec_t>
classo2scl
::
interp_akima
: public o2scl::interp_base<vec_t, vec_t>¶ Akima spline interpolation (GSL)
See also the Interpolation section of the O2scl User’s guide.
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. Use interp_akima_peri for perodic boundary conditions.
Storage for Akima spline interpolation
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void
akima_calc
(const vec_t &x_array, size_t size, ubvector &umx)¶ For initializing the interpolation.
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interp_akima
()¶ Create a base interpolation object with or without periodic boundary conditions.
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~interp_akima
()¶
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double
eval
(double x0) const¶ Give the value of the function \( y(x=x_0) \) .
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double
deriv
(double x0) const¶ Give the value of the derivative \( y^{\prime}(x=x_0) \) .
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double
deriv2
(double x0) const¶ Give the value of the second derivative \( y^{\prime \prime}(x=x_0) \) .
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double
integ
(double aa, double bb) const¶ Give the value of the integral \( \int_a^{b}y(x)~dx \) .
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const char *
type
() const¶ Return the type,
"interp_akima"
.
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interp_akima
(const interp_akima<vec_t, vec2_t>&)¶
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interp_akima<vec_t, vec2_t> &
operator=
(const interp_akima<vec_t, vec2_t>&)¶
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void