build_pwl_envelope

Builds a piecewise linear envelope around the data using
convex hulls and intersection logic similar to the original C++ code.

internal

Allows users to find a piecewise linear regression approximation to a given continuous univariate function within a specified error tolerance. Methods based on Warwicker and Rebennack (2025) "Efficient continuous piecewise linear regression for linearising univariate non-linear functions" <doi:10.1080/24725854.2023.2299809>.

John Warwicker

pwlapprox2d

Approximates Univariate Continuous Functions Through Piecewise
Linear Regression

build_pwl_envelope function

<dl><dt>data</dt>
<dd>A numeric matrix with two columns: x and f(x) values.
Must have at least two rows.</dd>
<dt>smallconst</dt>
<dd>Small constant for numerical tolerance (default 1e-6).</dd></dl>

Arguments

Construct Piecewise Linear Envelope — build_pwl_envelope

<dl>

<dt>data</dt>
<dd>A numeric matrix with two columns: x and f(x) values.
Must have at least two rows.</dd>


<dt>smallconst</dt>
<dd>Small constant for numerical tolerance (default 1e-6).</dd>

</dl>

build_pwl_envelope: Construct Piecewise Linear Envelope

Description

Usage

Value

Arguments