Simulated Data
A simulated data-set used for the illustration of grouped for grouped data
coming from a logit-normal distribution.
A data frame with 250 observations on the following 4 variables:
lothe lower limits of the response intervals.
upthe upper limits of the response intervals.
treatthe treatment indicator.
xa continuous covariate.
The data set has been produced with the code in the Examples below.
Dimitris Rizopoulos d.rizopoulos@erasmusmc.nl
## Not run:
n <- 250
treat <- rbinom(n, 1, 0.5)
x <- runif(n, -4, 4)
mu <- 1 + 0.5 * treat -1 * x + 0.8 * treat * x
u <- plogis(rnorm(n, mu, 2))
index <- cbind(c(0, 0.25, 0.5, 0.75), c(0.25, 0.5, 0.75, 1))
a <- b <- numeric(n)
for(i in 1:n){
ind <- which(index[, 2] - u[i] > 0)[1]
a[i] <- index[ind, 1]
b[i] <- index[ind, 2]
}
Sdata <- data.frame(lo = a, up = b, treat = factor(treat), x)
## End(Not run)
str(Sdata)
summary(Sdata)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.