Abstract
Barycentric rational interpolation is a recent interpolation method with several favourable properties. In this article, we present the BRI class, which features a new C++ class template that contains all variables and functions related to linear barycentric rational interpolation. While several methods exist to evaluate a barycentric rational interpolant, the class is designed to autonomously select the best method to use on a case-by-case basis, as it takes into account the latest results regarding the efficiency and numerical stability of barycentric rational interpolation [ 15 ]. Moreover, we describe a new technique that makes the code robust and less prone to overflow and underflow errors. In addition to the standard C++ data types, the BRI template variables can also be defined with arbitrary precision because the BRI class is compatible with the Multiple Precision Floating-Point Reliable (MPFR) library [ 14 ].
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