Package: vdg
Type: Package
Title: Variance Dispersion Graphs and Fraction of Design Space Plots
Version: 1.2.3
Date: 2024-04-23
Author: Pieter Schoonees [aut, cre, cph],
  Niel le Roux [ctb]
Maintainer: Pieter Schoonees <schoonees@gmail.com>
Depends: R (>= 4.3.0), parallel, ggplot2, quantreg
Imports: proxy, splines, gridExtra, grDevices, methods, stats, utils
Suggests: rsm, AlgDesign, knitr, lhs, tinytex
Description: Facilities for constructing variance dispersion graphs, fraction-
    of-design-space plots and similar graphics for exploring the properties of
    experimental designs. The design region is explored via random sampling, which
    allows for more flexibility than traditional variance dispersion graphs. A
    formula interface is leveraged to provide access to complex model formulae.
    Graphics can be constructed simultaneously for multiple experimental designs
    and/or multiple model formulae. Instead of using pointwise optimization to
    find the minimum and maximum scaled prediction variance curves, which can be
    inaccurate and time consuming, this package uses quantile regression as an
    alternative.
VignetteBuilder: knitr
License: GPL (>= 2)
LazyData: yes
Authors@R: c(person("Pieter", "Schoonees", email = "schoonees@gmail.com",
    role = c("aut", "cre", "cph")), person("Niel", "le Roux", role = "ctb"))
NeedsCompilation: yes
Encoding: UTF-8
RoxygenNote: 7.3.1
Packaged: 2024-04-23 12:30:41 UTC; schoo
Repository: CRAN
Date/Publication: 2024-04-23 13:00:02 UTC
Built: R 4.6.0; x86_64-w64-mingw32; 2025-10-29 18:37:18 UTC; windows
Archs: x64
