.. index:: single: cubic_spline_interpolator .. _cubic_spline_interpolator/0:

.. rst-class:: right

object

cubic_spline_interpolator

Natural and clamped cubic-spline interpolation using a tridiagonal solve.

| Availability: | logtalk_load(numerical_analysis(loader))

| Author: Paulo Moura | Version: 1:0:0 | Date: 2026-09-04

| Compilation flags: | static, context_switching_calls

| Imports: | public :ref:`interpolator <interpolator/0>` | public :ref:`options <options/0>` | Uses: | :ref:`list <list/0>`

| Remarks: | (none)

| Inherited public predicates: | Â :ref:`options_protocol/0::check_option/1` Â :ref:`options_protocol/0::check_options/1` Â :ref:`options_protocol/0::default_option/1` Â :ref:`options_protocol/0::default_options/1` Â :ref:`interpolator_protocol/0::evaluate/3` Â :ref:`interpolator_protocol/0::fit/2` Â :ref:`interpolator_protocol/0::fit/3` Â :ref:`options_protocol/0::option/2` Â :ref:`options_protocol/0::option/3` Â :ref:`options_protocol/0::valid_option/1` Â :ref:`options_protocol/0::valid_options/1` Â

.. contents:: :local: :backlinks: top

Public predicates

.. index:: derivative/4 .. _cubic_spline_interpolator/0::derivative/4:

derivative/4 ^^^^^^^^^^^^^^^^

Evaluates the first or second derivative of a fitted cubic spline.

| Compilation flags: | static

| Template: | derivative(Model,Argument,Order,Value) | Mode and number of proofs: | derivative(+compound,+number,+integer,-number) - one_or_error

| Exceptions: | Order is not one or two: | domain_error(derivative_order,Order)

---

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)

.. seealso::

:ref:`interpolator_protocol <interpolator_protocol/0>`, :ref:`piecewise_linear_interpolator <piecewise_linear_interpolator/0>`, :ref:`barycentric_interpolator <barycentric_interpolator/0>`