hero: Spatio-Temporal (Hero) Sandwich Smoother
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>.
| Version: | 0.6 | 
| Depends: | R (≥ 2.10) | 
| Imports: | Matrix, splines, optimx, pbapply, sf, sp, fields | 
| Suggests: | autoimage, devtools, fda, igraph, testthat, future.apply, Rmpi | 
| Published: | 2023-07-15 | 
| DOI: | 10.32614/CRAN.package.hero | 
| Author: | Joshua French | 
| Maintainer: | Joshua French  <joshua.french at ucdenver.edu> | 
| License: | GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] | 
| NeedsCompilation: | no | 
| Materials: | README | 
| CRAN checks: | hero results | 
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