ALTopt (version 0.1.0)

pv.fus.rc: FUS (Fraction of Use Space) plot for right censoring.

Description

pv.fus.rc draws the FUS plot of prediction variance for a given design with right censoring plan. The use region (useLower and useUpper) should be provided.

Usage

pv.fus.rc(design, tc, nf, alpha, formula, coef, useLower = NULL,
  useUpper = NULL)

Arguments

design

the data frame containing the coordinates and the number of allocation of each design point. The design created by either altopt.rc or altopt.ic or any

tc

the censoring time.

nf

the number of stress factors.

alpha

the value of the shape parameter of Weibull distribution.

formula

the object of class formula which is the linear predictor model.

coef

the numeric vector containing the coefficients of each term in formula.

useLower,useUpper

the vectors containing the lower bound and upper bound for the use region. They should be provided for FUS plot.

Value

• The "trellis" object which includes the FUS plot for right censoring.

See Also

altopt.rc

Examples

# FUS plot of I optimal design with right censoring.
Design <- altopt.rc("I", 100, 100, 2, 1, formula = ~ x1 + x2 + x1:x2,
coef = c(0, -4.086, -1.476, 0.01), useLower = c(1.458, 2.859), useUpper = c(2.058, 3.459))

pv.fus.rc(Design$opt.design.rounded, 100, 2, 1,
formula = ~ x1 + x2 + x1:x2, coef = c(0, -4.086, -1.476, 0.01),
useLower = c(1.458, 2.859), useUpper = c(2.058, 3.459))