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vdg  

Variance Dispersion Graphs and Fraction of Design Space Plots
View on CRAN: Click here


Download and install vdg package within the R console
Install from CRAN:
install.packages("vdg")

Install from Github:
library("remotes")
install_github("cran/vdg")

Install by package version:
library("remotes")
install_version("vdg", "1.2.3")



Attach the package and use:
library("vdg")
Maintained by
Pieter Schoonees
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2014-06-17
Latest Update: 2025-09-03
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.
How to cite:
Pieter Schoonees (2014). vdg: Variance Dispersion Graphs and Fraction of Design Space Plots. R package version 1.2.3, https://cran.r-project.org/web/packages/vdg. Accessed 26 Aug. 2026.
Previous versions and publish date:
(2026-07-09 06:58), 1.0.1 (2015-02-13 11:03), 1.0 (2014-06-17 21:16), 1.1.1 (2015-08-21 16:57), 1.1.2 (2015-10-26 15:59), 1.1.3 (2016-01-05 15:14), 1.1 (2015-05-04 12:06), 1.2.0 (2016-10-18 10:20), 1.2.1 (2020-12-16 21:00), 1.2.2 (2022-07-08 00:30), 1.2.3 (2024-04-23 15:00)
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