diffpen

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

diffpen function

<dl><dt>x</dt>
<dd>A <code>hero_bspline</code> object produced by <code>bspline</code>.</dd>
<dt>m</dt>
<dd>A positive integer indicating order of the difference penalty.</dd>
<dt>sparse</dt>
<dd>A logical value indicating if the result
should be a sparse version of the
<code><a href="/link/Matrix-class?package=hero&version=0.6" data-mini-rdoc="hero::Matrix-class">Matrix-class</a></code>.</dd></dl>

Arguments

Author

P-spline difference penalty — diffpen

<dl>

<dt>x</dt>
<dd>A <code>hero_bspline</code> object produced by <code>bspline</code>.</dd>


<dt>m</dt>
<dd>A positive integer indicating order of the difference penalty.</dd>


<dt>sparse</dt>
<dd>A logical value indicating if the result
should be a sparse version of the
<code><a href='https://rdrr.io/pkg/Matrix/man/Matrix-class.html'>Matrix-class</a></code>.</dd>

</dl>

diffpen: P-spline difference penalty

Description

Usage

Value

Arguments

Author

Examples