Variance Dispersion Graphs and Fraction of Design Space Plots

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.


Reference manual

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1.2.1 by Pieter Schoonees, 10 months ago

Browse source code at

Authors: Pieter Schoonees [aut, cre, cph] , Niel le Roux [ctb]

Documentation:   PDF Manual  

Task views: Design of Experiments (DoE) & Analysis of Experimental Data

GPL (>= 2) license

Imports proxy, splines, gridExtra, grDevices, methods, stats, utils

Depends on parallel, ggplot2, quantreg

Suggests rsm, Vdgraph, AlgDesign, knitr, lhs

See at CRAN