A tool for spatial/spatio-temporal modelling and prediction with large datasets. The approach models the field, and hence the covariance function, using a set of basis functions. This fixed-rank basis-function representation facilitates the modelling of big data, and the method naturally allows for non-stationary, anisotropic covariance functions. Discretisation of the spatial domain into so-called basic areal units (BAUs) facilitates the use of observations with varying support (i.e., both point-referenced and areal supports, potentially simultaneously), and prediction over arbitrary user-specified regions. 'FRK' also supports inference over various manifolds, including the 2D plane and 3D sphere, and it provides helper functions to model, fit, predict, and plot with relative ease. Version 2.0.0 and above also supports the modelling of non-Gaussian data (e.g., Poisson, binomial, negative-binomial, gamma, and inverse-Gaussian) by employing a generalised linear mixed model (GLMM) framework. Zammit-Mangion and Cressie <doi:10.18637/jss.v098.i04> describe 'FRK' in a Gaussian setting, and detail its use of basis functions and BAUs, while Sainsbury-Dale, Zammit-Mangion, and Cressie <doi:10.18637/jss.v108.i10> describe 'FRK' in a non-Gaussian setting; two vignettes are available that summarise these papers and provide additional examples.
Version: 2.3.1 Depends: R (≥ 3.5.0) Imports: digest, dplyr, fmesher, ggplot2, grDevices, Hmisc (≥ 4.1), Matrix, methods, plyr, Rcpp (≥ 0.12.12), sp, spacetime, sparseinv, statmod, stats, TMB, utils, ggpubr, reshape2, scales LinkingTo: Rcpp, TMB, RcppEigen Suggests: covr, dggrids, gstat, knitr, lme4, mapproj, parallel, sf, spdep, splancs, testthat, verification Published: 2024-07-16 DOI: 10.32614/CRAN.package.FRK Author: Andrew Zammit-Mangion [aut, cre], Matthew Sainsbury-Dale [aut] Maintainer: Andrew Zammit-Mangion <andrewzm at gmail.com> BugReports: https://github.com/andrewzm/FRK/issues/ License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] URL: https://andrewzm.github.io/FRK/, https://github.com/andrewzm/FRK/ NeedsCompilation: yes Additional_repositories: https://andrewzm.github.io/dggrids-repo/ Citation: FRK citation info In views: Spatial CRAN checks: FRK results Documentation: Downloads: Reverse dependencies: Linking:Please use the canonical form https://CRAN.R-project.org/package=FRK to link to this page.
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