Basic information for creation of D-optimal designs; this menu has been created in August 2010 and is still experimental. Please report issues for helping improve the software.
D-optimal designs are useful for generating the design points such that they are efficient for estimation of the parameters of a pre-specified model.
For more information, look at the help file for function
Dopt.design from package DoE.wrapper
or at optFederov from package AlgDesign.
must be a valid name. The design itself is created under this name in the R workspace.
An existing design can be selected,
or a new design can be generated;
the candidate design is a large design from which the D-optimal design
is selected.
formula of the model for which an optimum design is sought
constraint condition(s) on the design variables; for example,
if several factors refer to sizes, it may not be possible to combine
all settings (e.g. under space restrictions);
See Syntax and Logic
for an explanation of the syntax of general and especially logical
R expressions.
number of independent repeats for optimization;
increasing this number increases search time, but also the chances to
find a global optimum
can be provided for reproducing an existing design.
can be switched off in exceptional situations. Usually, one would not want to do that. Note that the checkbox here refers to the optimization process only. For the candidate set, this can also be decided on the respective separate menu.
Ulrike Groemping
See also function Dopt.design for the function
from DoE.wrapper that creates the design, which in turn is based on
function optFederov from package
AlgDesign.