stdrange

ustdrange

Simple functions for rescaling a data matrix to a coded design and back. <code>stdrange</code> converts
the design in actual measurements into a coded design, while <code>ustdrange</code> reverses the process
(if the correct arguments are given).

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.

Pieter Schoonees

Variance Dispersion Graphs and Fraction of Design Space Plots

Niel le Roux

stdrange function

<dl><dt>x</dt>
<dd>matrix containing the design, or an object coercible to a matrix.</dd>
<dt>mins</dt>
<dd>vector of original values, one for each column, which should be recoded to the value -1;
or which have alreadty been recoded to -1. This and the next argument are both recycled if not of the correct length.</dd>
<dt>maxs</dt>
<dd>vector of original values which should be recoded as 1, or which have already been recoded to 1.</dd></dl>

Arguments

Author

Standardize or Unstandarize the Column Range — stdrange

<dl>

<dt>x</dt>
<dd>matrix containing the design, or an object coercible to a matrix.</dd>


<dt>mins</dt>
<dd>vector of original values, one for each column, which should be recoded to the value -1;
or which have alreadty been recoded to -1. This and the next argument are both recycled if not of the correct length.</dd>


<dt>maxs</dt>
<dd>vector of original values which should be recoded as 1, or which have already been recoded to 1.</dd>

</dl>

stdrange: Standardize or Unstandarize the Column Range

Description

Usage

Arguments

Author