Understanding Spline Functions for Small Data Sets in R: A Practical Guide to Improving Accuracy Using Interpolation and Weighted Smoothing.

Retrieving the Design Matrix from Smooth.spline in R: A Step-by-Step Guide

Identifying Local Extrema in Smoothing Splines with R

Unlocking P-Spline Equations: A Step-by-Step Guide to Approximation and Exportation in R