.. index:: single: interpolator .. _interpolator/0:

.. rst-class:: right

category

interpolator

Common point validation and domain handling for one-dimensional interpolators.

| Availability: | logtalk_load(numerical_analysis(loader))

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

| Compilation flags: | static

| Implements: | public :ref:`interpolator_protocol <interpolator_protocol/0>` | Uses: | :ref:`list <list/0>`

| Remarks: | (none)

| Inherited public predicates: | Â :ref:`interpolator_protocol/0::evaluate/3` Â :ref:`interpolator_protocol/0::fit/2` Â :ref:`interpolator_protocol/0::fit/3` Â

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

Public predicates

(no local declarations; see entity ancestors if any)

Protected predicates

.. index:: prepare_points/3 .. _interpolator/0::prepare_points/3:

prepare_points/3 ^^^^^^^^^^^^^^^^^^^^

Validates and sorts interpolation points and returns separate abscissa and ordinate lists.

| Compilation flags: | static

| Template: | prepare_points(Points,Abscissas,Ordinates) | Mode and number of proofs: | prepare_points(+list(pair),-list(number),-list(number)) - one_or_error

| Exceptions: | Points is a variable: | instantiation_error | Points is not a valid list of at least two numeric points: | domain_error(interpolation_points,Points) | Points contains a duplicate abscissa: | domain_error(duplicate_abscissa,Abscissa)

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.. index:: check_argument/3 .. _interpolator/0::check_argument/3:

check_argument/3 ^^^^^^^^^^^^^^^^^^^^

Checks that an interpolation argument lies in the closed fitted domain.

| Compilation flags: | static

| Template: | check_argument(Argument,Lower,Upper) | Mode and number of proofs: | check_argument(+number,+number,+number) - one_or_error

| Exceptions: | Argument is a variable: | instantiation_error | Argument is not a number: | type_error(number,Argument) | Argument lies outside the fitted domain: | domain_error(interpolation_domain,Argument)

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.. index:: select_interval/3 .. _interpolator/0::select_interval/3:

select_interval/3 ^^^^^^^^^^^^^^^^^^^^^

Selects the fitted interval containing an already validated argument.

| Compilation flags: | static

| Template: | select_interval(Argument,Intervals,Interval) | Mode and number of proofs: | select_interval(+number,+list(compound),-compound) - one

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Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)