precompute

This function is an internal function to compute
objects needed for fast implementation of the sandwich
smoother. It is meant to be an internal function,
so use this at your own risk.

An implementation of the sandwich smoother proposed in Fast Bivariate Penalized Splines by Xiao et al. (2012) <doi:10.1111/rssb.12007>. A hero is a specific type of sandwich. Dictionary.com (2018) <https://www.dictionary.com> describes a hero as: a large sandwich, usually consisting of a small loaf of bread or long roll cut in half lengthwise and containing a variety of ingredients, as meat, cheese, lettuce, and tomatoes. Also implements the spatio-temporal sandwich smoother of French and Kokoszka (2021) <doi:10.1016/j.spasta.2020.100413>.

Joshua French

hero

Spatio-Temporal (Hero) Sandwich Smoother

precompute function

<dl><dt>B</dt>
<dd>A matrix of basis functions</dd>
<dt>P</dt>
<dd>A penalty matrix</dd>
<dt>m</dt>
<dd>Difference order of P-spline</dd></dl>

Arguments

Precompute objects — precompute

<dl>

<dt>B</dt>
<dd>A matrix of basis functions</dd>


<dt>P</dt>
<dd>A penalty matrix</dd>


<dt>m</dt>
<dd>Difference order of P-spline</dd>

</dl>

precompute: Precompute objects

Description

Usage

Value

Arguments

Examples