choiceDes (version 0.9-3)

cp.scree: Scree plot for tradeoff designs

Description

Line plot showing the relationship between the criterion used to assess column position balance and the number of iterations in the column position balancing routine.

Usage

cp.scree(des)

Arguments

des

An R object containing the results from a call to tradeoff.des.

Value

A line plot showing the relationship between the criterion used to assess column position balance and the number of iterations in the column position balancing routine.

Details

Column position balancing is the most computationally intensive process in calls to tradeoff.des. The number of iterations required for this step is determined by the Rc argument in that function which defaults to the larger of 1,000 or 10 x the number of rows in the design. Large design problems may require a larger number of iterations to achieve optimal column position balance. The plot generated by this function can help to assess whether additional Rc iterations would lead to better column position balance.

See tradeoff.des for additional details.

Examples

# NOT RUN {
des <- tradeoff.des(12, 4, 10, 9)
cp.scree(des)
# }