pv.vdus.ic {ALTopt}  R Documentation 
pv.vdus.ic
draws the VDUS plot of prediction variance
for a given design with interval censoring plan. The use region
(useLower
and useUpper
) should be
provided.
pv.vdus.ic( design, t, k, nf, alpha, formula, coef, useLower = NULL, useUpper = NULL )
design 
the data frame containing the coordinates and the number of
allocation of each design point. The design created by either

t 
the total testing time. 
k 
the number of time intervals. 
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 
useLower, useUpper 
the vectors containing the lower bound and upper bound for the use region. They should be provided for VDUS plot. 
The "trellis" object which includes the VDUS plot for interval censoring.
## Not run: # VDUS plot of I optimal design with interval censoring. Design < altopt.ic("I", 100, 30, 5, 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.vdus.ic(Design$opt.design.rounded, 30, 5, 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)) ## End(Not run)