Nothing
predictive.checks.AROC.bsp <-
function(object, statistics = c("min","max","median","skewness"), devnew = TRUE) {
if(class(object)[2] != "AROC.bsp") {
stop(paste0("This function can not be used for this object class: ", class(object)[2]))
}
y0 <- object$data_model$y$h
n0 <- length(y0)
nrep <- length(object$fit$sd)
yrep <- matrix(0, nrow = n0, ncol = nrep)
for(l in 1:nrep) {
yrep[,l] <- rnorm(n = n0, mean = as.numeric(object$data_model$X$h%*%object$fit$beta[l,]), sd = object$fit$sd[l])
}
i = 1
for(stat in statistics) {
if(i != 1 & devnew) dev.new()
yrepstat <- apply(yrep, 2, function(y, stat) {do.call(stat, list(y))}, stat = stat)
ystat <- do.call(stat, list(y0))
xlim <- range(c(yrepstat,ystat))
hist(yrepstat, col = "gray60", main = stat, xlim = xlim, xlab = "Statistic")
abline(v = ystat,col="red",lwd=3)
i = i + 1
}
if(devnew) dev.new()
ylim <- c(0, max(density(y0)$y) + 0.2)
xlim <- c(min(density(y0)$x) - 0.2, max(density(y0)$x) - 0.2)
plot(density(yrep[,1]), col = "lightskyblue1", ylim = ylim, xlim = xlim, main = "Density", xlab = "Diagnostic test outcome (nondiseased group)")
# Only a sample
s <- sample(1:nrep, ifelse(nrep < 500, nrep, 500))
for(i in s){
lines(density(yrep[,i]), col = "lightskyblue1")
}
lines(density(y0),col = "black",lwd = 4)
res <- list()
res$yrep <- yrep
res$y0 <- y0
invisible(res)
}
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