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snapKrig

Fast Kriging and Geostatistics on Grids with Kronecker Covariance

v0.0.3 · Jul 4, 2026 · MIT + file LICENSE
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Description

Geostatistical modeling and kriging with gridded data using spatially separable covariance functions (Kronecker covariances). Kronecker products in these models provide shortcuts for solving large matrix problems in likelihood and conditional mean, making 'snapKrig' computationally efficient with large grids. The package supplies its own S3 grid object class, and a host of methods including plot, print, Ops, square bracket replace/assign, and more. Our computational methods are described in Koch, Lele, Lewis (2020) <doi:10.7939/r3-g6qb-bq70>.

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r-devel-linux-x86_64-debian-clang NOTE
r-devel-linux-x86_64-debian-gcc NOTE
r-devel-linux-x86_64-fedora-clang NOTE
r-devel-linux-x86_64-fedora-gcc NOTE
r-devel-windows-x86_64 NOTE
r-oldrel-macos-arm64 NOTE
r-oldrel-macos-x86_64 NOTE
r-oldrel-windows-x86_64 NOTE
r-patched-linux-x86_64 NOTE
r-release-linux-x86_64 NOTE
r-release-macos-arm64 NOTE
r-release-macos-x86_64 NOTE
r-release-windows-x86_64 NOTE
Check details (26 non-OK)
NOTE r-devel-linux-x86_64-debian-clang

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-debian-clang

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-devel-linux-x86_64-debian-gcc

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-debian-gcc

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-devel-linux-x86_64-fedora-clang

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-devel-linux-x86_64-fedora-gcc

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-devel-windows-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'sk.R' 'sk_export.R' 'sk_index.R' 'sk_pars.R' 'sk_plot.R'
    'sk_plot.Rd' 'sk_sub.Rd' 'sk_var.Rd' 'sk_var_mult.Rd'
NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-oldrel-macos-arm64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-oldrel-macos-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-oldrel-windows-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'sk.R' 'sk_export.R' 'sk_index.R' 'sk_pars.R' 'sk_plot.R'
    'sk_plot.Rd' 'sk_sub.Rd' 'sk_var.Rd' 'sk_var_mult.Rd'
NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-patched-linux-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-release-linux-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-release-macos-arm64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-macos-arm64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-release-macos-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-release-windows-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'sk.R' 'sk_export.R' 'sk_index.R' 'sk_pars.R' 'sk_plot.R'
    'sk_plot.Rd' 'sk_sub.Rd' 'sk_var.Rd' 'sk_var_mult.Rd'
NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                           ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                                      ^
checkRd: (-1) sk_GLS.Rd:40: Lost braces; missing escapes or markup?
    40 | Operations with V^{-1} are computed using the factorization \code{fac} (see \code{sk_var}), or
       |                   ^
checkRd: (-1) sk_LL.Rd:37: Lost braces; missing escapes or markup?
    37 | \code{quad_form} is z^T V^{-1} z, for the observed response vector z, which is constructed
       |                           ^
checkRd: (-1) sk_var.Rd:41: Lost braces; missing escapes or markup?
    41 | returns the quadratic form X^T V^{-1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^

Check History

NOTE 0 OK · 14 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
NOTE r-devel-linux-x86_64-debian-clang

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-debian-gcc

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-fedora-clang

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-linux-x86_64-fedora-gcc

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-macos-arm64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-devel-windows-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'sk.R' 'sk_export.R' 'sk_index.R' 'sk_pars.R' 'sk_plot.R'
    'sk_plot.Rd' 'sk_sub.Rd' 'sk_var.Rd' 'sk_var_mult.Rd'
NOTE r-patched-linux-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-linux-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-macos-arm64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-macos-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘sk.R’ ‘sk_export.R’ ‘sk_index.R’ ‘sk_pars.R’ ‘sk_plot.R’
    ‘sk_plot.Rd’ ‘sk_sub.Rd’ ‘sk_var.Rd’ ‘sk_var_mult.Rd’
NOTE r-release-windows-x86_64

DESCRIPTION meta-information

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'sk.R' 'sk_export.R' 'sk_index.R' 'sk_pars.R' 'sk_plot.R'
    'sk_plot.Rd' 'sk_sub.Rd' 'sk_var.Rd' 'sk_var_mult.Rd'
NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?

...[truncated]...
1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?

...[truncated]...
1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^
NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?
    34 | The GLS solution is: b = ( X^T V^{-1} X )^{-1} X^T V^{-1} z,
       |                                  ^
checkRd: (-1) sk_GLS.Rd:34: Lost braces; missing escapes or markup?

...[truncated]...
1} X.
       |                                  ^
checkRd: (-1) sk_var.Rd:33: Lost braces; missing escapes or markup?
    33 | either matrix \code{V}, or X^T V^{-1} X, or a factorization ('chol' or 'eigen')
       |                                  ^

Code

Structure

Lines of code

11,887

Files

82

Compiled share

0%

Has compiled src

No

Language breakdown

R 6,951 (58.5%)Docs 4,290 (36.1%)Vignettes 646 (5.4%)

API

Exported functions

36

Internal functions

16

Recent export changes

v0.0.1+36 sk, sk_GLS, sk_LL +33 more

Testing & CI

Has tests

No

Test-to-code ratio

0.00

testthat edition

–

CI present

No

CI type

[]

PR gated

No

Docs

Return-value doc rate

100%

\dontrun example ratio

0%

Roxygen coverage

100%

Has pkgdown

No

NEWS present

Yes

Health & Security signals

Informational signals; not verdicts.

on.exit coverage

100%

Unsafe pattern score

0

Dep constraint coverage

0%

Secret pattern count

0

Bundled 3rd-party code

2 items

Portability & License

Min R version

–

System requirements

–

C++ standard

–

License

MIT + file LICENSE

License flags

SPDX valid, OSI approved

History

Versions

2

First release

2023-01-09

Latest release

2023-05-06

Avg cadence

117 days

Cold removal rate

–

Dep drift

0

LOC over versions

v0.0.1: 12,016 LOCv0.0.2: 11,887 LOC

Per-file churn detail lives in the source pipeline: https://github.com/r-observatory/cran-code-metrics.

Version History

4 tracked
updated 0.0.3 ← 0.0.2 diff Jul 4, 2026
new 0.0.2 Mar 10, 2026
updated 0.0.2 ← 0.0.1 diff May 5, 2023
new 0.0.1 Jan 8, 2023